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The Master Lock No. 377DAT features a trailer coupler lock, designed to fit 1-7/8in (48mm), 2in (51mm) and most 2-5/16in (59mm) trailer couplers. The advanced locking mechanism provides resistance to picking and prying. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.

Fits 1-7/8in (48mm), 2in (51mm) and most 2-5/16in (59mm) trailer couplers
Advance locking mechanism resists picking and prying
Easy to install and remove
Resists rust and corrosion

BEST USED FOR: OUTDOORS
Marine & Offshore Security
Trailers, Trucks, & Towing
Trailers, Vans & Moving Trucks