The Master Lock No. 176 Resettable Combination Padlock features a 2in (51mm) wide solid brass case for strength and weatherability and a 1in (25mm) tall, 5/16in (8mm) diameter hardened steel shackle for excellent cut resistance. The 4-digit dials allow you to set-your-own combination and reset to restrict/change allowed access – 10,000 combinations available. The key override feature allows supervisory access at any time if needed.