Trailer Coupler Lock, Fits 1-7/8 to 2-5/16 in, 4 Keys

Trailer coupler lock protection helps deter theft by covering your straight tongue ball coupler and blocking access to the latch and chains. Built from reinforced carbon steel with a thick-wall design, this heavy-duty hitch lock fits common 1-7/8 in, 2 in, and 2-5/16 in coupler sizes for RV, trailer, and boat security. Powder coating and a dust cap support reliable outdoor use.

• Fits 1-7/8", 2", and 2-5/16" straight tongue flat-edge ball couplers; verify coupler width is not over 4.34".


• Delivers heavy-duty resistance with a 6.83 lb steel body and 0.31" wall thickness to help deter prying and drilling.


• Installs in under 30 seconds; slide on, lock, and go with one-handed operation and a cushion pad for a steadier fit.


• Includes 4 keys plus a copper lock cylinder for smoother turning and a dust cap to help block moisture and grime.


• Secures coupler area and security chains for parked RVs, utility trailers, travel trailers, and boat trailers.

When your trailer is left in a driveway, storage lot, or campground, the coupler is an easy target. This nesting-style lock adds a physical barrier around the hitch connection to discourage tampering and slow down opportunistic theft attempts. Keep an extra key with your tow vehicle, and use the dust cap after locking to reduce exposure to rain and road spray. Grab yours today and lock up before your next trip.

• Compatible coupler sizes: 1-7/8 in (47.5 mm), 2 in (50.6 mm), 2-5/16 in (58.6 mm)


• Compatible coupler type: Straight tongue, flat edge ball coupler


• Max coupler width supported: 4.34 in (110.2 mm) internal diameter


• Internal height: 2.65 in (67.3 mm)


• Material: Carbon steel with surface coating; copper lock cylinder


• Wall thickness: 0.31 in (8 mm)


• Product dimensions: 5 in x 3.46 in (127 x 88 mm)


• Weight: 6.83 lb (3.1 kg)


• Keys included: 4