Brinks Home Security 44MM solid, chrome plated steel padlock. The lock body is constructed from solid steel. The shackle is constructed of chrome plated, hardened steel, and is shrouded for extra security. This lock is equipped with a brass pin tumbler cylinder for a long lasting, smooth working action. This lock has a dual ball locking mechanism for increased security. This is the perfect lock for storage facilities, industrial storage cribs, outdoor storage crates/gates. Package contains 2 keys for each lock. Uses M1 key blank.