Standard Dial Combination Lock COMBINATION LOCK APPLICATION: Indoor combination lock is best used as a school locker lock and gym lock, providing protection and security from theft. DESIGN: Preset three-digit combination lock for keyless convenience. SECURITY: Combo lock is construted with a metal body, stainless steel cover, hardenedsteel shackle, and anti-shim locking mechanism for strength and security EASY TO USE: For the first time you open this lock follow instruction from the back of the lock; Take a picuture to save in your mobile phone or write it down. Then remove the password sheet or wipe it out.