Hiplok Z-Lok Combo Armoured Removable Tie Single The new Z LOK COMBO is a multi-use combination lock featuring a reinforced steel core and toughened nylon outer, allowing the Z LOK to be both secure and lightweight. Hiplok's lock + hold design allows for full adjustability along its large 43cm locking diameter. Features & Benefits: Lock & Hold Ratchet Design Reinforced Steel Core 43cm Locking Diameter Basic security for low-risk areas 3 Digit Combination Lock with number reset function