Master Lock 1530DCM X-treme Combination Lock in Blue UNBREAKABLE: Hard-wearing, resettable combination lock. Sturdy aluminum cover with long-lasting anodized finish. Resistant to any kind of tampering. Ideal gym locker combination lock. SECURE: Extra-durable, hardened steel shackle separates this combination lock set from other anti-theft locks. Easy-to-use padlock for school locker, padlock for gun case, gym locker padlock etc. RELIABLE 3-DIGIT COMBINATIONS: Best combination lock set to own that lets you use 1,500 3-digit combinations for enhanced security. NO KEY TO LOSE: Hi-tech numerical combination eliminates the need for keys in these super-strong locks for lockers and other storage areas. BRIGHT METALLIC COLORS: Bright blue color for easy identification.