4FT（120CM） Heavy Duty Anti-theft Chain Combination Lock

High-security combination design: Ditch the hassle of keys with RollRoad’s smart 5-digit resettable combination lock—offering 100,000 possible codes for superior security over standard 4-digit locks. Sturdy & durable: Built tough with a zinc alloy lock cylinder and a 0.24-inch drill-resistant alloy steel chain, ensuring maximum protection. Versatile use: At 4ft (120cm), it easily secures two bikes together. Perfect for e-bikes like Emma 3.0, as well as ladders, gates, toolboxes, and more. Enjoy your ride with RollRoad—keeping thieves away!