Heavy Duty Indoor & Outdoor Lock The heavy-duty padlock one-piece lock body, 304 stainless steel locking beam, 52mm wide lock body, 8mm diameter shackle, 270g weight. Maximum security combination lock is designed for indoor and outdoor use. High Quality & Weatherproofcombination lock is made of high strength zinc alloy which is anti-rust and weather-resistant. Padlock is constructed with a zinc body and reinforced body bumper for strength and reliability, hardened 304 stainless steel shackle for cut resistance. 4 Digit Combination Lock Unlike 3 digit combination, it provides 10000 code combinations which is harder and safer than the previous version. In addition, 4-position metal code wheel the latch of this lock is strong enough that can't be removed or cracked by human force. You needn't worry the security anymore! One-Touch Locking Designlocker padlock has a unique look and is convenient and ritualistic as the hook can be ejected by pressing the middle button after the 4 codes have been set. Hidden Password & Anti-error Design The password is located at the bottom of the lock, which enhances the concealment. To change the password, you need to unscrew the screw, push the setting key up to see the SET key, and then reset the password. This can effectively avoid the problem that the password cannot be opened due to inadvertent password change.