Fits 1-7/8 inch (48mm), 2 inch (51mm) and most 2-5/16 inch (59mm) trailer couplers
Advanced locking mechanism resists picking and prying
Easy to install and remove
Aluminum diecast finish resists rust and corrosion
Limited Lifetime Warranty provides peace of mind from a brand you can trust.
The Master Lock No. 377KA features a trailer coupler lock, designed to fit 1-7/8 inch (48mm), 2 inch (51mm) and most 2-5/16 inch (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.
