As one of the UK's biggest Winkhaus UPVC Locks suppliers we have a vast range of Winkhause Centre Case Gear Boxes for UPVC. Quite often it is possible to fix faulty WInkhaus Multi Point Door Locks by replacing the centre section also known as the centre case / gear box. This makes an easier and more affordable repair solution. We have the Winkhaus Cobra UPVC Centre Case Gear Box Lock available in 35mm, 45mm & 55mm in a standard version and key wind version. To help identify you replacement Winkhaus UPVC door lock centre case, please follow the UPVC Door Lock Identification guide.