The Cisa C2000 Euro Cylinder & Turn 33/33 NP 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 one side and a thumb turn on the other. Hardened steel pins and driver in the first position protects from drilling and has a 5 pin key bitting system. The mushroom drivers and paracentric keyway provide anti-picking resistance. Standard 33mm x 33mm Cylinder Overall Size: 66mm Euro With Thumbturn Finish: Nickel Plated What's in the box 1 x Cisa Cylinder 2 x Keys