How Does ICON Trailer Coupler Lock Compare To Master Lock 379DAT?
Updated 09/10/2025 | Published 09/09/2025
Products Featured in This Question
Question:
How secure is the ICON # AL63DQ compared to something like the Master Lock 379DAT?
asked by: Derek
Expert Reply:
Derek, great question. The Master Lock # 379DAT works fine as a deterrent, but it can be defeated with basic tools. The ICON # AL63DQ takes it several steps further: it’s cast from a single block of hardened steel that’s as tough as any saw or drill bit, and it has an anti-drill lock face that just spins if you try to bore it out. In real tests, it shrugs off sawzalls, sledgehammers, and 5 inch angle grinders.
This ICON lock is for couplers with a rather large, flat lip on the coupler. If you don't have that, you'd instead have a cast style (see image), you can go with # AL38DQ.
Have you had theft concerns before, or are you just being proactive?
(click to enlarge)
Product Page this Question was Asked From
ICON Trailer Coupler Lock for Flat Lip 2-5/16" Ball Coupler - Cast and Stainless Steel - Black
- Trailer Tongue Lock
- Surround Lock
- Universal Application Lock
- Keyed Unique
- Steel
- Fits 2-5/16 Inch Ball
- Flat Lip
- B and W
more information >
Continue Researching
- Q&A: Best Coupler Lock For 2-5/16" Ball That Cannot Be Easily Defeated
- Article: The Best Trailer Tongue Locks for Preventing Trailer Theft
- Q&A: What Lift Kit Fits The #11 Torflex Axles Under 2023 Airstream Flying Cloud 30RD Tandem Axle Camper?
- Q&A: Looking For Color Monitor For TST Tire Pressure Monitoring System
- Q&A: Hitch Pin Weight Capacity and Sheer Strength
- Q&A: How to Chock Tandem Axle Trailer While Using Leveling Blocks
- Q&A: Recommended Best Theft Protection Lock for a Trailer Coupler w/a Angled Lip Past the Receiver?
- Q&A: Coupler Lock Recommendation for Coupler with Thick Lip
- Article: Electric Trailer Brakes: How They Work & What to Buy
- Article: How to Winterize & De-Winterize Your RV (Simple Guide)
- Article: How to Hitch and Lock a Trailer
- Article: The 5 Best Trailer Drop Hitches You Can Buy
- Article: Dealer Spotlight - Taps Truck and Auto Accessories