You are looking at a Loc-it Slide lock coupler lock. This housing will cover not only the coupler, but also the slide. This lock fits Ram, Curt and other Generic couplers shown, channel and A frame. This will not fit Bulldog or Fulton couplers that have a round nose. These are of Heavy-Duty Steel Welded Construction. The locks are bolt cutter proof. The only way to remove this lock is by cutting torch and electric cutting tools. The square housing is where the locking to the coupler is done. Not for locking up chains. This will be secure even if slide is in the open position. This is a very secure lock for these couplers. The housing is coming with puck lock and is enamel painted. Can be repainted your color. Comes with a 90 warranty from the manufacturer to cover manufacturing defects. There is FREE SHIPPING to the lower 48. All material is made in USA. Check out our other listings for the lock you have. Channel, stand, and coupler are for display ONLY, the sale does not include these mentioned. NO INTERNATIONAL SHIPPING...PLEASE