Made of zinc alloy, which has good toughness, strength, cut resistance, good wear resistance and durability. These combination locks have high security, and a 4-digit password lock takes 10 times longer to open than a 3-digit lock, which is more reliable. Combination locks are easy to set your own password, and you no longer need to bring your key. The concave-convex design of the roulette wheel makes the hand feel good and easy to operate. The numbers are easy to read, maneuver, set and reset to your own personal code. Excellent design, suitable for school gym locker, fence, tool box, pencil case, hasp storage., Manufacturer: KEMTAT