Baloray 8pcs 40mm Diamond Shape Crystal Glass Cabinet Knob (40mm*8) MATERIAL: Clear cut crystal glass and alloy base, shiny polished chrome, glittering and sparking, diamond shape, good decoration for your home or office. SIZE: The knobs diameter approx 1.57nch(40mm), height approx 1.57inch(40mm); APPLICATION: Fit for cabinet dresser drawers cupboard wardrobe bookcase etc,give your furniture a sparkly new looking. INSTALLION: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. ATTENTION:Please use this knobs with the objects that thickness is not over 1 inch.