PVC-u Espag Inline 40mm Spindle Key Locking Window Handle - White The PVC-u espag window handle offers a great, low cost retrofit solution for your windows. Ideal for fitting, these inline handles improve the appearance of your windows and offer a secure key locking mechanism for additional security. With industry standard 40mm fixing centres, these handles are ideal for many window locks. Key Measurements & Information Inline Espag Window Handle - fits both left hand and right hand applications. Key Locking with Push Button Operation. Universal Fitting with 40mm Fixing Centres. Comes with 40mm spindle bar length and fixing screws to suit. Comes complete with key, screw cap cover to suit finish. Spindle Length: The spindle is measured from the base of the handle to the end of the spindle as shown below. Handle Screw Hole Fixing Centres: Most espag handles are designed to conform to industry standards with 40mm between the screw hole centres. Consequently, it doesn't matter if you choose a style that's different to your existing handle, so long as the handle centres measure 40mm, the handle will fit.