Trimax T6 Watercraft Bow Ring Lock (5.5" long x .5" diameter pin) 1/2" diameter pin O-ring keeps water, grime and dirt out of locking mechanism to ensure years of use Protective rubber cap protects keyhole from water, grime and dirt Type A key which is a spring loaded, 7 pin, high security key. Resists attempted drill outs. Rugged and durable, the key will not bend or break. Lifetime Warranty