Introducing the Anvil Lock, fits any size, type or style of coupler, comes with a 2 5/16" Ball - however you can put any 1" shank ball into this lock, simple set up, tested under the harshest enviroments - Not just a deturent! So far all other locks have failed our extreme test enviroment, this is 3/8 plate steel Not a toy, our most recent additions include a puck lock drill/pick guard and a front plate, this front plate can accomodiate mounting a spare wheel onto it. This prevents getting power tools clost to it. Simple illistrations included in box, thanks for looking - includes all you see in white background photo's