S5 Coupler Locks: The best security solution for your trailer.
Locks are custom tailored to each trailer coupler's design. Most S5 lock bodies are built with 1/4" structural steel, powder coated using Sherwin Williams powder, and secured with a puck-style lock.

LCS011 - King Pin
This lock is designed to support king pins used both on 5th wheel camper couplers and heavy commercial trailers. Puck Lock is included in price.