Door rack bolts are an ideal way to increase security on timber doors. They are morticed into the door and operated by a spline key that throws the bolt into the frame. For optimum security it is recommended that he bolts or fitted to the top and the bottom of the window. Backset mm 31 Bolt Dia. mm 13 Bolt Throw mm 18 Case Depth mm 60 Case Dia. mm 16 Corrosion Rating 2 - Occasionally damp/wet, rural and sheltered areas Description Door rack bolts are an ideal way to increase security on timber doors. They are morticed into the door and operated by a spline key that throws the bolt into the frame. For optimum security it is recommended that he bolts or fitted to the top and the bottom of the window. Faceplate Size H x W mm 42 x 20 Faceplate Type Square Finish Polished Chrome Included Items Key (Qty 1) Keep Size H x W mm 42 x 20 Material Steel No. of CSK Screws 6 Product Code 200951 Screw Size imp. 4 x 5/8 Screw Size mm 3.0 x 15