Hiplok Lite v1.0 Wearable Bicycle Lock The Hiplok is the world's first bicycle lock developed specifically to be worn on the body, seriously strong with a hardened steel chain at its core Hiploks are fully adjustable - one size fits 26" to 44" waist, The padlock uses a hardened shackle resistant to bolt croppers and hacksaw attacks With Hiplok there's no need to attach or hang a lock to your bike, meaning you don't spoil the clean lines of your machine, or scratch your frame The locking mechanism uses a disc tumbler system which is almost impossible to pick The lock body is stainless steel with a molded case of super tough nylon, The chain is case hardened steel alloy