4 Digit Combination Padlock, Heavy Duty Anti Theft U-Shape Security, 140Mm]. ** [ Premium Heavy Duty Bike Lock ] : This bike lock comes with a diameter 0.65 inch heavy duty shackle and has excellent heat resistant and hydraulic shear resistant. Equipped with a 0.10 inch silicone cover,helps to protect your bike from scratches, and the lock from wearing out. ** [ Adjustable Shackle Lock ] : Upgraded 4 digit combination locks come with U-shaped adjustable shackle, which can be full drawn out. The inner diameter of the lock beam can be adjusted up to 14cm, and the shortest is 12cm. It will meet more needs for your indoor and outdoor use. ** [ High Security and Anti-theft ] : This combination lock consists of 4 digits and offers 10,000 combinations. It is more secure than a 3-digit lock. You can set your preferred combination, which is enough to protect your property and your privacy. ** [ More Safety ] : This gym lock is made from zinc alloy and hardened steel material, this fitness lock has the features of anti- rust, waterproof and cutting resistance.With complex serpentine key slot which is safer to use. ** [ Portable and Practical ] : The lock is 21.8cm (8.5 inches) in length and will fit most latches,perfect for indoor and outdoor use.Suitable for mountain bicycles, motorcycles, electric bike, scooters bike, and courtyard gates etc.