Heavy Duty Indoor & Outdoor Lock. The heavy-duty padlock features a one-piece lock body, 304 stainless steel locking beam, 52mm wide lock body, 8mm diameter shackle, and 270g weight. This maximum security combination lock is designed for indoor and outdoor use. High quality and weatherproof combination lock is made of high strength zinc alloy, providing anti-rust and weather-resistant performance. The padlock has a zinc body with a reinforced body bumper for strength and reliability, and a hardened 304 stainless steel shackle for cut resistance. 4-digit combination lock offers 10,000 code combinations, making it more secure than 3-digit models. The 4-position metal code wheel ensures the latch cannot be removed or cracked by human force. One-touch locking design allows the hook to be ejected by pressing the center button after setting the 4-digit code. Hidden password design located at the bottom of the lock enhances security and concealment. To change the password, unscrew the screw, push the setting key up to reveal the SET key, then reset the combination. This feature helps prevent lockout due to accidental code changes.