describe No need to carry a key: Since it is a combination lock, there is no need to carry a key. To create the code, just remove the loop section from the lock and make sure all points are aligned with the indicator. Twist the capped end of your partial lock and remove the ring. Slide the ring with your access code and replace the cover. The kit comes with full instructions and you can refer to the video in the help list for help. Sturdy and Weatherproof: This combination lock is made of zinc alloy metal. Its materials and design are sturdy enough to protect your door, gate, jump deck or gym locker from anyone trying to steal from you. What's more, the 4-digit combination, which not only provides keyless convenience, but also makes you feel more secure, can be configured with 10,000 combinations. This makes this lock 10 times more secure than a 3-digit combination lock. Fit and Secure: This lock can be used to lock and secure almost anything. With a long shackle, it's perfect for use with your outdoor bike and goes through the bike's body and flywheel for maximum safety. Also great to use with your shed and even for some storage containers. Sturdy Lock: This padlock is designed to fit most sized latches. Specification: Size: Long lock is 14.8cm long and 6.4cm wide. When locked, the space in the shackle is 13 x 4.8 cm (5.11 x 1.89 in) and the thickness of the shackle is 7 mm. black Shipping Quantity: 1 Piece Note: other things are not included, the color is subject to the first picture, other pictures only show the effect Due to differences between different monitors, the pictures may not reflect the actual color of the item. . due to manual measurement. Please allow for deviations. Thanks