HIGH SECURITY: 4-digit combination locks are more convenient - compared to 3-digit combination locks, adding protection against thieves, who can usually be hacked in minutes. The 4-digit number offers more than 1000 combinations that are easy to maintain and cannot be manually dismantled. High quality and perfect design, fashionable zinc alloy design, rustproof, weatherproof, small size, lightweight, easy to carry, strong and pressure-resistant, and cannot be manually disassembled. Applicable occasions: schools, gymnasiums, sports bags, tool boxes, garden gates, filing cabinets, storage outside, lockers for staff, garden sheds. The silver look is very versatile and can be worn on any occasion. Resettable and easy to use: you can configure or redefine your own combination in 4 steps, the method of use can change to learning of the product packaging/introduction of the product image.