Master Lock Chain Lock,  Set Your Own Combination Bike Lock, 3 ft. Long, Assorted Colors, 8311DAST LOCK APPLICATION: For indoor and outdoor use; Chain lock is best used for bicycles, ladders, lawn mowers, and sports equipment EASE OF USE: Resettable 4 dial combination for keyless convenience, set and reset your combination allowing thousands of personalized combination code options DURABLE DESIGN: Chain is made from hardened steel for resistance to cutting and sawing; protective sleeve for added weather and scratch resistance. SPECIFICATIONS: 3 ft. chain length; 1/4 in. chain link diameter