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What Size Couplers Will the Coupler Lock Fit in Universal Keyed Alike Trailer Lock Set # 3794DAT


I am buying a car hauler trailer that I want to protect from tampering while it is on and off the tow vehicle coupler ball lock, coupler latch lock and a receiver pin lock, but do not want to have ten million different keys. So I would like to have a nice set all in one convenient storage case all keyed alike. My coupler on the trailer is 2 5/16 IN. Will the Masterlock 3794DAT fit a 2 5/16 IN. coupler as well as 1 7/8 IN. and 2 IN. coupler or is 2 IN. the max size coupler it will fit? If not is there a set that will fit all three?


Expert Reply:

The coupler lock that is part of the Master Lock Universal Keyed Alike Trailer Towing Lock Set, # 3794DAT, is a universal fit coupler lock designed to fit most couplers. It fits 1-7/8 inch, 2 inch, and 2-5/16 inch couplers. I have included a video review of just the coupler lock below.

The Hitch Lock fits both 1-1/4 inch and 2 inch trailer hitch receivers and the coupler latch lock will fit latches up to 2 inches wide with a 1/4 inch or less hole diameter. I have included a link below to a demo video of this set.

expert reply by:
Michael H

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