The new Series 1740 Mk IV padlock from Camlock Systems (UK) is fitted with a re-programmable âeight locks in oneâ? octagon radial pin tumbler mechanism providing maximum protection against the un-authorised duplication of keys. The padlock has a corrosion resistant brass body, a stainless steel shackle and double ball bearing locking. Key retention is a feature as is the availability of key registration with suited padlocks. The Camatic reprogramming system means that if a key is lost or stolen, the user can change the key to another of the eight combinations by the simple use of a change key. The octagon mechanism also ensures the lock is highly resistant to picking.