6-pin precision-machined cylinder for extra security.Re-inforced Nylon body is non-conductive, non-sparking and resistant to chemicals and corrosion.Colour coded for easy identification , they can also be supplied with photo luminescent labels that glows in the dark. Supplied with individually coded keys for optimum securityEach padlock is supplied in a box with 1 key.Available in Hardened Steel shackle or with Stainless Steel Shackle ( in 25 46 85 mm shackle sizes) SS shackles are used for corrosive industrial offshore environments.Most popular combination of Master Key locks is of 5 Key Different locks with 1 master key.