Cisa 40mm Master Keyed Solid Brass Padlock Set of 2 Real security padlocks used in mines and municipalities - When it comes to durability and reliability, Cisa guarantees the best performance over the long term offering a 10 year guarantee. - Designed for high use in residential and commercial applications. - NICKEL plated, Carbon-Nitrogen hardened steel shackle for strength and anti-corrosion. - Highly Pull Resistant Shackle The double locking shackle means it is virtually impossible for the shackle to be pulled out of the padlock body. - Master Keyed means a master key will open all padlocks and each padlock has its own key that will not open any of the other padlocks - A 6% thicker shackle than other 40mm padlock brands Dimensions: - Padlock width: 40mm - Shackle Diameter: 6.4mm - Distance between shackle and padlock body: 22.5mm