High Quality: This padlock is made of zinc alloy, rust and corrosion resistant. It is the most durable and secure padlock available. Security and Anti-Theft: 4-digit password provides 10,000 password combinations to enhance security and better protect your property. In addition, the security of a 4-digit combination lock is ten times greater than that of a 3-digit combination lock. EASY TO USE: The large numbers are easy to read, you can use your favorite numbers to set or reset your password. Please remember your password after setting. Widely Used: You can use them anywhere without having to carry keys. Ideal for most tasks such as fitness/light exercise, school and employee lockers, cabinets, boxes, rings and more.