Trimax Stainless Steel Universal Keyed Alike Receivers and Coupler Lock Set - This set will help you lock up your hitch so someone doesn't take what you have attached to your hitch. Set Includes SXTS32 (1/2in x 5/8in Span – 100% Stainless Steel Universal Receiver Lock & Sleeve) SXTC123 (Stainless Steel Adjustable Coupler Lock, 7/8in, 2-1/2in To 3-1/2in Spans)