A combination lock is a type of padlock in which a sequence (permutation) of numbers or symbols is used to open the lock. The sequence may be entered using a single rotating dial which interacts with several discs or cams, by using a set of several rotating discs with inscribed numerals which directly interact with the locking mechanism, or through an electronic or mechanical keypad. Types range from inexpensive three-digit luggage locks to high-security safes. Unlike a regular padlock, combination locks don't use keys. Padlocks are detachable locking devices used to protect against unauthorized use, vandalism, and theft. They are designed to protect against some degree of surreptitious and forced entry. Typically padlocks use keys and can be referred to as a key lock. Here at Outdoor Shopping we offer the best in security locks so whether you are locking up at the gym or locking up your bike trust Outdoor Shopping to keep your valuables protected. Great for bikes, gym, fence, storage, garage, tool box, shed, safety, lockouts, school, lockers, and driveways.