TOPTOW is a well experienced manufacturer of towing accessories. We only craft products with the best quality. TOPTOW easy access trailer hitch lock fits most ball mounts. The dual pin of 1/2" and 5/8” pin makes it fit both light class ball mount and heavy duty towing products. The lock pin is made of one piece solid hardened steel, strong and durable. All-weather rubber key slot cap keeps the key hole away from rain, snow, moisture, dust, rust, protecting the internal lock mechanism. Package includes 1 x 1/2" diameter pin, 1x 5/8" diameter lock pin,1 x lock head with rubber cap, 2 x keys. This bent pin receiver lock is compatible with hitch rack, cargo hitch tray, bike rack, hitch ball and tow rope, ensure the towing safety.