The Master Lock No. 1525 3-digit combination padlock includes key control override (Control Keys are sold separately) for supervisory access. This lock can be keyed to your facility’s existing system or with a new code. The Master Lock No. 1500D Standard Dial Combination Padlock offered without key control overide. They both feature a wide metal body for durability, with a stainless steel cover. The 3-digit combination offers keyless convenience. The locking mechanism features anti-shim technology, offering maximum security. Shackle dimension is 3⁄4”.