377DAT – 378DAT trailer coupler lock
The Master Lock No. 377DAT and 378DAT 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