The Hooply 33 Ultra Door Gearbox is very heavy-duty, suitable for steel doors. It is ideal for when only the centre case needs replacing and avoids the replacement of the full multipoint lock unit. It has a 30mm faceplate and 225mm screw centres and is non handed for use with both left hand and right hand applications. Operated by a euro profile cylinder with a 60mm Backset and 68mm centres between spindle and cylinder centres.