The SUPER48 Heavy Duty retractable key chain was built for rugged use and hard work. The durable Black polycarbonate case is impact resistant. Attach your keys or small tools to the oversized split ring and secure the clip to your belt. When you need your keys just pull them out, when your done let them go and the built-in tether retracts back into place until you need them again. When you need a heavy duty key holder to secure a large number of keys, The SUPER48 Heavy Duty retractable key chain your best choice.