CAR WINDOW BREAKER: The carabiner can be removed from the wallet chain and used separately. The spike on the carabiner is made of tungsten steel, which is hard and strong enough to easily break a one-story car window. This feature allows you to use it to escape in dangerous situations DOUBLE LOCK DESIGN: The biker key chain has a double lock design mechanism, the lock can only be unlocked when both sides of the switch are pressed at the same time, which can effectively prevent the loss of your belongings. We own the exclusive design patent of this wallet chain MATERIALS: The long pant chain is made of high-gloss polished and high-quality plated stainless steel chain, assembled with zinic alloy clasp, the whole wallet chain is about 24.5in long, weighing about 5.8oz(165g) MULTIPURPOSE: It can also be used as a key chain, and also a common men's jeans chain, pocket chain, belt chain, heavy duty biker wallet chain in life GUARANTEED SERVICE: Our primary goal is to satisfy our customers. We offer 12 months of after-sales service. If you have any problem while using, we will solve the problem for you within 24 hours in work day This is a stylish keychain with chain, the keychain on the taper nails made of super hard tungsten steel, durable, widely suitable for different outdoor activities and daily use.