Suitable for use with any of our unsprung knob sets or 57mm centre unsprung lever lock handles. For matching rebate kit, see product code 90054. Product is 'Keyed Alike', meaning more than one cylinder can be operated with the same key. Equipped with an extra strong spring to ensure our weighty knob sets and levers always return to position. Case Size:109mm (H) x 17mm (T) Case Depth: 76mm Backset: 56mm Centre: 57mm Forend Size: 162mm (L) x 26mm (W)