Master Lock Receiver Pin & Clip with Pivot Lock. This single unit is designed to fit both 1/2" and 5/8" size receivers, making it a versatile choice for securing your trailer or other towed equipment. The built-in pivot lock replaces the traditional pin, allowing for easy insertion and locking with a simple twist. The bent pin style is ideal for tight and hard-to-reach receivers, while the tapered end ensures smooth insertion. Made from hardened steel for superior cut and shear resistance, this receiver pin is nickel and chrome plated for durability. The pivot lock pivots to insert or to lock the pin in place.