Master Lock Sleeved Pivot Lock Hitch Pin has a stainless sleeve instead of pin to make this single unit good to fit 0.50 inch or 0.625 inch size receivers. It also features bent pin style for tight and hard to reach receivers and has tapered ends for easy insertion. It comes with a hardened steel pin for improved cut and shear resistance and features a nickel and chrome plating. These pivot locks help to lock the pin in place.