Master Lock 2" Zinc Die-Cast Copper Color Tamper Resistant Combination Lock features a 2-inch wide resettable 4-digit combination that secure and convenient access. Its zinc die-cast case provides exceptional strength and durability, making it i for long-lasting use. The case-hardened steel shackle, measuring 5/16 inch thick, ensures robust protection against cutting and tampering. This lock includes a combination changer that is fully protected from tampering when the lock is closed, enhancing security. Additionally, it has a positive-action change key for easy and reliable combination resetting. With a 1-inch vertical shackle , this lock is versatile for various applications. Model Number: 175D