Features: High quality material: made of high quality metal, wear and corrosion resistant, not easy to rust and break, strong and durable. Easy to use: You can drill the screw hole and the screw cover pair at the same time and keep both on the same. After screwing, the screw cover lies below the plane of the plate. Durable: the drill bit is made of carbon steel for high cutting power and durability, and its accuracy is higher than that of ordinary drill bits. Practical: the hexagonal handle can be changed quickly and the depth of the sub-sleeve can be adjusted with an key to accommodate gripping the screw head or a deep cover to cover the matching plug. Widely applicable: quicker ejection of wood chips and the possibilities of obtaining a smoothing surfaces on any type of hardwood, softwood or aluminium. Fast ejection of wood chips for a smoothing surfaces on any type of hardwood, softwood or aluminium. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: Metal Size: As shown Package List: 1 set x Wood Countersink Drill Bit