Hiplok v1.50 Original Superbright Wearable Bicycle Lock Our High Security Wearable bike lock for high risk areas 8mm hardened steel chain combines with our 12mm hardened steel shackle sleeved in a robust impact resistant nylon. Huge 85cm locking circumference fully adjustable to fit waist size 28-44" Hiplok's patented wearable design - never locked when worn Removable, washable 600D nylon sleeve with optional reflective detail Sold Secure SILVER rated 3 keys are included featuring Hiplok's unique, smooth action, curved design.