4-Digit Security Padlock: The 4-digit padlocks allow you to set your own code with 10,000 unique options. It's 10 times more secure than a three-digit lock. EASY TO USE: 6 simple steps to set the code padlock. Large numbers and side window design make it easy to read. In addition, the locker padlock is equipped with an advanced damping device inside. Each of your numbers will snap into place with better precision and feel when aligning your code. STURDY AND DURABLE: With a high-strength zinc alloy body, a shackle made of hardened steel and excellent craftsmanship, the sturdy college locker padlock is resistant to weather and cutting and sawing. WIDE APPLICATION: The number padlock is perfect for indoor use and outdoor such as gym lockers, college, school, escape game, wardrobe, cupboard, toolbox, garage door, garden shed, bacyard, fence, general storage box, etc. Note: This is a large or medium size locker code lock 1.73 x 0.86 x 3.11 inches, shackle diameter: 6mm, not really suitable for zipper holes.