Default screw length is 25mm,Measure the Thickness of Your Drawers Before Place Order.If you need screws of other lengths, please contact us for the length of the screws you need. Material: crystal + zinc alloy; size: total length 70mm, diameter 30mm, height 31mm;Diamond door handles are made of crystal glass and zinc alloy, they are durable while decorating your home furnishings. Easy to install, Find the position where you want to install on the board and drill a hole , then pass through the screw from the back of board anf thread tight to the knob. Be careful during the work. The crystal knob touches comfortable and has a perfect texture. The crystal knob shines in the light and reflects various kinds of brilliant colors, which refreshes the whole room and makes the room elegant. Applications: Used for wardrobe, cabinet, chest, dresser, drawers, bathrooms, cupboard, bin, nightstand, etc., Manufacturer: ENSDIEPLS