No need to carry a key: This is a combination lock, so there is no need to carry a key. To set the code, remove the loop section from the lock and ensure all points are aligned with the indicator. Twist the capped end of the lock and remove the ring. Slide the ring to set your access code and replace the cover. The kit includes full instructions, and a video in the help section is available for reference.Sturdy and weatherproof: This combination lock is made of zinc alloy metal. The materials and design provide durability to help protect your door, gate, jump deck, or gym locker. The 4-digit combination offers keyless convenience and enhanced security with 10,000 possible combinations, making it more secure than a 3-digit combination lock.Fit and secure: This lock is suitable for securing a variety of items. With a long shackle, it is ideal for outdoor bikes, allowing it to pass through the bike frame and wheel for added safety. It is also great for use with sheds and storage containers.Sturdy lock: This padlock is designed to fit most latch sizes.Specification: Size: The long lock is 14.8 cm long and 6.4 cm wide. When locked, the shackle opening is 13 x 4.8 cm (5.11 x 1.89 in), and the shackle thickness is 7 mm. Color: Black Shipping quantity: 1 piece Note: Accessories shown in images are not included. The color is based on the first image; additional images are for illustration only. Due to differences in monitor displays, actual item color may vary slightly. Due to manual measurement, slight variations in dimensions may occur.