The C2000 euro double cylinder is manufactured in conformity with the European EN 1303 standard: Durability grade 6 and Security grade 3. A key can be used to operate it from both sides. Hardened steel pins and driver in first position protects from drilling. It has a 5 pin key bitting system (3 and 4 pins for shorter sizes). The mushroom drivers and paracentric keyway provides anti-picking resistance. 28mm x 28mm Cylinder Overall Size: 56mm Euro 5 pin Cylinder Finish: Nickel Plated 2 x Keys Supplied What's in the box 1 x Cisa C2000 56mm Cylinder 1 x Cylinder Screw 2 x Keys