You are purchasing a New GSRF, Loc-it coupler lock for a 2 5/16 ball coupler. This will fit stamped couplers only. As you can see, this body of the coupler lock, is 1/4" thick on the housing. This comes with a puck lock with 2 keys as shown. This is a very secure way of locking the coupler on the trailer so thieves have no way to tow your trailer away. This does not fit Slide Lock Couplers !! This lock comes with Free Shipping to the lower 48 states. A 90 day Factory Warranty included. Made in good old USA. Color may change. All material is made in USA. If returned, buyer pays return shipping fees. Does Not Fit UFP Couplers !! Please check out our other listings for coupler locks if you have not seen what you want in " See other Items". Note: Coupler must be a total width of 4" or less to fit housing. No International Shipping Please.