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Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball

Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball

Item # C23088

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Trailer Coupler Locks

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Curt Surround Lock - C23088
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Product Images

In Use/Installed

  • Surround Lock
  • Fits 2 Inch Hitch
  • Curt
  • Keyed Alike
  • Universal Application Lock
  • Aluminum
Kit includes a sturdy aluminum coupler lock to prevent towaway theft, an adjustable 1/4" diameter latch lock to ensure that your trailer won't be unhooked from the coupler, and a trailer hitch receiver lock that fits 2" hitches. Lowest Prices for the best trailer coupler locks from Curt. Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball part number C23088 can be ordered online at or call 800-298-8924 for expert service.

  • All Info
  • Reviews (25)
  • Q & A (7)
  • Videos (2)
  • Photos
  • Why etrailer?

Curt Trailer Coupler Locks - C23088

Kit includes a sturdy aluminum coupler lock to prevent towaway theft, an adjustable 1/4" diameter latch lock to ensure that your trailer won't be unhooked from the coupler, and a trailer hitch receiver lock that fits 2" hitches.


  • 3-Piece lock set deters theft of your trailer
  • Keyed-alike locks make it easy to lock and unlock your setup
    • Includes 2 keys
  • Coupler lock deters trailer theft by fitting over the coupler, preventing hookup
    • Designed for use when trailer is not in tow
    • Prevents a trailer ball from being inserted into the coupler
    • Easy, quarter-turn lock activation
  • Coupler latch lock keeps others from unhooking your trailer after it's hooked up
    • Adjustable lock with 5 locking positions fits wide variety of coupler latch sizes
  • Hitch receiver lock is used in place of standard pin and clip
    • Helps prevent theft of your ball mount or hitch-mounted accessory
    • Locking cap threads onto the pin
  • Covers on hitch receiver lock and coupler latch lock help keep water and dirt out of the lock cylinders
  • Durable construction with corrosion-resistant finishes
    • Hitch lock and latch lock are steel with chrome plating
    • Coupler lock is aluminum with anodized finish
  • Assembled in the USA


  • Trailer coupler lock:
    • Application: trigger-style latch coupler with straight lip for 2" or 2-5/16" ball
  • Adjustable trailer coupler latch lock:
    • Application: trigger-style latch (or lever-style latch) ball couplers
    • Inside pin length (span): 1/2" - 2-1/2"
    • Pin diameter: 1/4"
  • Hitch receiver lock:
    • Application: 2" x 2" trailer hitches (Class III and Class IV)
    • Pin diameter: 5/8"
    • Inside pin length (span): 2-5/8"
    • Overall length: 6"
  • 1-Year limited warranty

coupler lock dimensions

Your towing setup has numerous places that could be compromised by would-be thieves. Arm your setup with this set of locks from Curt. The kit contains all the locks you need to guard your setup from theft, including a coupler lock, a coupler latch lock, and a hitch receiver lock. Each lock is keyed-alike, which means the same key will lock and unlock all of them so that you only have to keep track of one set of keys to make sure your trailer is safe.

23088 Curt Hitch and Coupler Lock Set for 2" and 2-5/16" Flat Lip Couplers

California residents: click here

Video of Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Curt Trailer Coupler Locks - Surround Lock - C23088 Review

Today we're going to be taking a look at the Curt Trailer Hitch Receiver and Coupler Lock Set. This is a three piece lock set that helps deter theft of your trailer. All the locks on the unit are keyed alike. That way it makes it easy to lock and unlock your set up. Two keys are included. Now, the coupler lock which is this unit right here.

This deters theft by fitting over the coupler and preventing hookup. It's designed for use when the trailer is not in tow. It prevents a trailer ball from being inserted into the coupler of your unattended trailer. You're also going to get a coupler latch lock. This keeps others from unhooking your trailer after it's been hooked up. It is fully adjustable.

It's going to have five locking positions so it's going to fit a wide variety of coupler latch sizes. Then you're also going to get a hitch receiver lock that's used in place of a standard pin and clip. This helps prevent theft of your ball mount or hitch mount accessory. It's got the locking cap that simply threads onto the pin. You'll notice that on the receiver lock and the coupler latch lock, we're going to have these covers on there. These help keep out water and dirt.

That way it extends the life of the lock cylinder. That's a nice design to the unit. It's got easy grip design on it too, rubber coating and then a grip design here on the other end allows you to always operate the two ends of the lock and pin. Really nice design, very easy to use, we're looking at a very durable construction with corrosion resistant finishes. The hitch lock and latch lock are steel with chrome plating, the coupler lock is aluminum with an anodized finish. The product's made right here in the USA.

When it comes to the application, this is designed for trigger style latch couplers with straight lip for 2" or 2 5/16" hitch balls. Here, in a minute, I'm going to show you how the units would install onto an application. The adjustable trailer coupler latch lock, this is going to work well on trigger style latches or lever style latches when it comes to the ball coupler. The inside span or usable pin length is going to range from 1/2" to 2 1/2". The pin diameter is 1/4". The hitch receiver lock is designed for 2" X 2" trailer hitches, pin diameter is 5/8". When it comes to getting this onto a coupler, what you need to do is stick a key in there, move it to an unlocked position, then you would take it, place it over the coupler, make sure that's pushed up, and then push in the lock, and then it's on there. It secures around the lip, also goes in the socket here so that's going to prevent somebody from being able to come up and hook up to your unattended trailer. The latch lock, very simple to use as well. Stick a key in there, rotate it to remove it. This would go through this point of the coupler right there at the lever. Then you don't have to have the key in there, you can just take this, slide it onto the position that works best, and then that's secure. Then, this unit right here would install in the trailer hitch and go through the 5/8" pin hole on the ball mount, out the other side of the hitch, place this back on there, and you thread it down with the keys in there. Once it comes to a stopping point, remove the keys, place on the cover, and then your ball mount is locked to the receiver of the hitch. That's going to do it for today's look at the Curt Trailer Hitch Receiver and Coupler Lock Set.

Customer Reviews

Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball - C23088

Average Customer Rating:  4.5 out of 5 stars   (25 Customer Reviews)

Kit includes a sturdy aluminum coupler lock to prevent towaway theft, an adjustable 1/4" diameter latch lock to ensure that your trailer won't be unhooked from the coupler, and a trailer hitch receiver lock that fits 2" hitches.

- C23088

I ordered this and it arrive before I knew it I think it might've taken three days not release sure I love the fact that one key unlocks all three perfect fit for my camper and a hook onto my trailer on my truck and it's nice having one key thank you so much. 325142

- C23088

Have had this lock for a year now. All 3 pieces are working just fine. Even the rubber cover over the keyhole is still there and fits like a glove, usually the strap breaks and the cover gets lost. Not on this bad boy! Have used this on 2 different trailers, sure is nice having one key. 458936

- C23088

They are easy to use, especially since they are all keyed alike. I added wheel X-chocks with locks between my tandem axle wheels for added security. I don't know if all these locks have discouraged anyone from trying to steal our trailer, but it can't hurt to make it look as difficult and inconvenient as possible. Plus, you try to park in open, high visible areas when possible. They do help my peace of mind when I have to leave my trailer for any time. 525631


Still using them. I saw where someone tried to pry the hitch lock with a crowbar. It doesnt look like they tried very hard. Maybe something scared them off or maybe they noticed the wheel chocks and quit trying, I dont know. The main thing is they didnt get our trailer! The more locks, the better!

Bill - 06/22/2019


- C23088

I have 2 trailers so I ordered 2 sets. They work great, just what I needed. Also Heather was awesome. I placed the order with her over the phone, she sent me all the information concerning shipping and followed up with me when they arrived. I look forward to doing business with etrailer in the future. 375619


Hey, the two trailer couplers I ordered are working just fine. I havent had any issues with them. They are just what I needed for my trailers.

Allen R - 05/07/2018


- C23088

The trailer hitch lock did not fit my Airstream trailer hitch so it was useless although the other two fit the only one I have even a little confidence about is the one that holds the ball portion of the hitch to the vehicle. The other that keeps the ball attached to the trailer is only good for that purpose as it could be broken easily and removed so for security purposes almost useless. 458651

- C23088

etrailer is awesome - high quality products, easy transactions, and great customer service - Shipping was perfect as well!! 609147

- C23088

I just tried the lock kit. The hitch pin that holds the receiver on to my vehicle is not long enough for my 2008 Sequoia or my 2013 tundra. What are the options on this? 581189


The Toyota OEM trailer hitch uses thicker walled tubing for the hitch receiver which prevents this hitch lock from working. The # RH5-XL
Trailer Hitch Receiver Lock - Extra Long - Flush Design for 2-1/2" Trailer Hitches
is long enough to accommodate the extra width, and would work well.

-- Mike L - 11/09/2018


- C23088

I am delighted with the service that I have received from all of the sales people at etrailer. Everyone has been very helpful and has stayed in touch. The product arrived right on time and is exactly what I needed. I would recommend etrailer to anyone. You will not be disappointed. 576307

- C23088

Lock kit came quickly even with economy shipping. Seam like very good quality. I like the fact everything is keyed alike makes using it less of a chore. This was my second order, have been impressed with products and service. 560792

- C23088

I am extremely please with my Lock set for my Trailer and Hitch. 460080

- C23088

trailers sits most of the year, hitch is good easy to put inane off 459646

- C23088

Works really good 459311

- C23088

I enjoy the product on a daily bases. Works great and I really like the same fits all part, thanks 459096


100 happy with the items I have.

Donald A - 12/12/2018


- C23088

Latch pin and receiver pin lock are top quality items. 3 stars because the tongue cover slides right off of my trailer so it is a useless item for my trailer! 458850

- C23088

Great way to ensure your “stuff” stays where you want it or put it. Easy to use. 458607



Mike - 12/09/2018


- C23088

Just received the product today. Initial inspection revealed quality of the product, and ease of use. Everything fit perfectly. Would recommend this product and your company 453891


Everything still working. Holds up to weather great.

Thomas - 11/21/2018


- C23088

Box arrived torn open on both ends. Hardware bag was open. Everything seems to be here but I will know better after installing 397906

- C23088

Haven't installed yet, looks as represented online. 388649

- C23088

Nice to have a single key for everything. Coupler locks work great. The receiver lock is too short for my 2008 Toyota Sequoia hitch, so I can't use it. Make sure you measure all your hitch pieces before ordering. Quality feels good. 369186

- C23088

Worked just as advertised 353876

- C23088

received order and products exactly what i ordered 349695

- C23088

Great product, great price, was delivered as advertised and super fast delivery. Thanks again ! 327990

- C23088

A very good product. 326941

- C23088

As described, great products, excellent price!!! 325068

- C23088

Nice fit. All pieces work well. A couple of extra keys would be nice. Came with 2, but with the security offered, it would be nice to have some hidden or reserve keys set aside to avoid destroying stuff. Still, a good product at a very reasonable price. 325023


Ask the Experts about this Curt Trailer Coupler Locks
Do you have a question about this Trailer Coupler Lock?

  • Can Keys for Curt Trailer Locks be Duplicated
  • A locksmith could duplicate the keys used for Curt trailer hitch locks # C23088. Since your business uses cargo trailers you might also be interested in tracking devices such as the Linxup GPS Vehicle Tracking Device # 300-AT3-S. So if a trailer is ever stolen you will be able to find it and bring the thieves to justice! I have linked a video for you.
    view full answer...

  • Trailer Coupler, Latch, and Hitch Lock Sets with Replaceable Keys
  • Curt does not offer replacement keys for Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball Item # C23088 so I recommend a different, similar system. We have Deadbolt Trailer Hitch Lock and Coupler Lock Kit - 2" Hitches - 1-7/8" or 2" Ball Item # TSK1-AS but the biggest difference with it is that the coupler lock is for 1-7/8 inch or 2 inch ball couplers. We also have Reese Tow and Store Lock Kit - Keyed Alike Item # RP7014700. It features the following: 1/4"...
    view full answer...

  • Coupler Lock and Trailer Hitch Receiver Lock That are Keyed Alike
  • There is a combination coupler lock and hitch receiver lock which can be keyed alike though the Atwood AT89017 and AT89011 cannot. Instead, you can use the Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball # C23088. I've added links to a pair of video reviews of these locks for you to take a look at.
    view full answer...

  • Recommended Weight Distribution and Anti-Sway System For 2004 Range Rover And 7500 GVWR
  • For a weight distribution system with anti-sway, you want to look at the total tongue weight of you vehicle and trailer. The total tongue weight is the loaded tongue weight of your trailer combined with any cargo weight behind the rear axle of your towing vehicle. For your 2004 Range Rover, that would be your cargo area when loaded. Your trailer tongue weight when loaded is normally between 10 and 15% of your total trailer weight. With this in mind and considering for some cargo...
    view full answer...

  • Will The Curt Trailer Hitch Receiver and Coupler Lock Set Fit A 2009 Toyota Tundra Hitch?
  • Yes. The Curt Trailer Hitch Receiver and Coupler Lock Set, # C23088, will fit your 2009 Toyota Tundra with 2 inch trailer hitch receiver. You will not need an extra long lock. I've attached some videos for you of this lock and it's function. The coupler lock will secure your trailer when unconnected, the coupler latch lock will secure your trailer when connected, and the hitch lock will secure your ball mount to your hitch. These three locks are key-alike and this kit comes with two...
    view full answer...

  • Recommended Locks for Trailer That Are Keyed Alike
  • To get multiples of all of those parts keyed alike is not an option. To get them keyed alike for one trailer/truck however is an option. I recommend the Curt Trailer Hitch Receiver and Coupler Lock Set - 2" Hitches - 2" or 2-5/16" Ball # C23088 for that application. Multiples of this part number will each be keyed differently.
    view full answer...

  • Recommended Trailer Coupler Locks Keyed Alike for Multiple Trailers
  • The Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set - 1-1/4" and 2" Hitches # 3794DAT does not allow for a keyed alike option at all. For a keyed alike option, I recommend the Fastway Universal Trailer Coupler Lock for 1-7/8", 2" and 2-5/16" Couplers # DT25013KA if you just need the coupler locks. To order multiples, select keyed alike and then adjust the quantity before adding to cart. If you need coupler and trigger locks keyed alike then I recommend the Curt Trailer...
    view full answer...

Do you have a question about this Trailer Coupler Lock?

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Info for this part was:

Edited by:
Lindsey S
Expert Research:
Michael H
Video Edited:
Dustin K
Installed by:
Cole B
Written by:
Chelsea B
Installed by:
Hayden R
Photos by:
Stacy F
Updated by:
Hannah L
Updated by:
Kristina F
Updated by:
Isabelle B

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