Features: Make of aluminum alloy, which is Enduring and not easy to rusts. it can be used for long terms. Comes with a shackle for excellent heat resistance and hydraulic shear resistance. 4 digit combination lock designs for increasing the security. You can easily set or resets the Passwords. Adopts a unique keyless designs, which saves you the pressure of carrying key. You don't need a key here. Suitable for bicycles, but also for motorcycles, glass door, sheds, fence. Long Adjustable Padlock is very convenient to use and carrying on many occasions. Specifications: Materials: Aluminum alloys Styles: 1/2/3 Styles 1 Size: 21.5x11.7cm/8.46x4.61inch Styles 2 Size: 26.5x11.7cm/10.43x4.61inch Styles 3 Size: 31.5x11.7cm/12.40x4.61inch Package Includes: 1pc Combination Lock note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.