" MAS " 377-KA-0501 MASTER LOCK PRODUCTS

#377 KEYED ALIKE #0501 TRAILER COUPLER LOCK

The Master Lock No. 377KA features a trailer coupler lock, designed to fit 1-7/8" (48mm), 2" (51mm) and most 2-5/16" (59mm) trailer couplers. The advanced locking mechanism provides resistance to picking and prying. 

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