Master Lock Coupler Lock Uni 48mm 51mm M/L Towball Lock Security Protection

This lock protects unattended trailers and guards against tow-away theft. Fits 1-7/8", 2" and some 2-5/16" couplers. For 2-5/16" couplers we recommend one of the Model #379 locks. COUPLER LOCK FEATURES: • Advanced locking mechanism resists picking and prying. • Simple installation and removal. • Chrome finish resists rust and corrosion. • Matching colored keyhead for added convenience. • Limited Lifetime Warranty.