Features:1. Universal handle made of aluminum alloy material, durable to use.2. Fit for most doors, windows.3. 43mm screw hole centres.4. Child safe handle, requires button press.5. With key and screws accessories, easy to install.Specifications:Type:Door Window Handle KitMaterial:Aluminum AlloySize:16x10x1.8 cmScrew Hole Centres: 43mm/30mm/35mm/40mmSpindle Length: 9, 15, 20, 30 & 40mmSpindle Width: 7mm SquareMeasuring Your HandleScrew Hole Fixing Centres:Most handles are made to industry standards with 43mm screw hole centres, therefore it really doesn& 39;t matter if you choose a style that& 39;s different to your existing handle, as long as the handle centres measure 43mm these handles will fit.Handing:These handles are cranked/offset so you will need to check the handing. Basically a left handed handle is one you would use your left hand to open. Please view the pictures for more information.Spindle Length:Remove the two screws fixing the handle to the window and measure from the base of the handle to the tip of the spindle.Spindle width:Although almost all spindle widths measure 7mm square, its worth checking before ordering as some unusual 8mm variations have been known, although these are mostly on timber windows.