- Coupler lock is best used for trailers; Works best with Straight Tongue Trailer Couplers
- Advance locking mechanism resists picking and prying
- Designed to resist rust and corrosion
- Fits 2-5/16 in. (59 mm) trailer couplers; Does not fit Gooseneck Trailer Couplers
- Includes one trailer coupler lock, two keys
The Master Lock No. 378DAT features a 2-5/16 inch (59mm) trailer coupler lock, designed to resist rust and corrosion. The advanced locking mechanism provides resistance to picking and prying. Advance locking mechanism resists picking and prying
