Dxhycc 10pcs Purple 30mm Flat Round Crystal Glass Cabinet Knobs Cupboard Drawer Pull Handles MATERIAL: zinc alloy + crystal glass,100% new knobs, high quality,diamond shape,glittering and sparking. SIZE: The knobs diameter approx 1.18inch(30mm), height approx 1.18inch(30mm). Screw: M4 * 20mm 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. APPLICATION: Fit for cabinet dresser drawers cupboard wardrobe bookcase etc,give your furniture a beautiful new looking. NOTES: Please use this knobs with the objects that thickness is not over 1inch.