1.Master lock design: 4-digit combination locking mechanisms, keyless convenience for freely set your favorite password number. Initial password number is 0000. 2.High Quantity: High strength and high tenacity for strong cut resistance. Flexible bicycle lock cables for strong cut resistance and PVC coating helps prevent scratching. 3.Anti-theft:The 4-digit up to 9999 unique and individual combinations, reduces casual theft possibilities while making it easier for you to remember your password at the same time. 4.Portable: These mini anti theft bike lock just only 105g. Weight-saving design, easy to carry. 5.Multipurpose:These bike lock easy to operation and ideal for lock helmet, saddle, wheels, luggage, bicycles, skateboards, gates and fence.