Hiplok Lite v1.0 Wearable Bicycle Lock (Black/White) Waist Sizing: Minimum 26? (66cm) / Maximum 44? (112 cm) Locking Circumference: Maximum 75cm Weight: 1kg /2.2 lbs. Adjust the Hiplok around waist to a secure, comfortable tension as you would a normal belt Put key into padlock buckle, take other end of belt and loop the last chain link into padlock loop