Discus Padlock Stainless Steel 5mm pin tumbler locking mechanism Weatherproof 3 keys Security rate: 6 Size: 70mm Tessi 70Mm Stainless Steel Discus Padlock | Ted70 The 70mm discus lock has a stainless steel body which makes it corrosion resistant for outdoor use. It comes equipped with a 5mm pin tumbler locking mechanism and a hardened steel shackle. The design of the lock makes is very resistant to cutting or prying as very little of the shackle is visible when the lock is in place. Each lock comes with 3 nickel-plated brass keys as standard.