Features:* .* Made of material, and practical to use.* Widely used: sharpened cutting edges for multi-purpose drilling on drywall, blocks, tile, wood, aluminum and sheet metal.* Efficient design: the triangular shank is designed to prevent slippage and allows the drill bit to hold firmly and steadily in the electric drill. The U-type cavity design provides excellent chip removal ability due to the overall blasting treatment. No broken edges, no shaking, small cut resistance, fast hole speed, easy chip removal.* Material and dimensions: high-quality drill bit set made of tungsten carbide, which prevents bits from breaking and provides longer service life, strength and durability. 2 flute design, for better drilling dust removal. Specifications:* Material: Carbide* Optional Types:(As pictures show)1#:5pcs (4/5/6/8/10mm)2#:7pcs (3/4/5/6/8/10/12mm)(Approx.).* Color: As pictures show* Size:As pictures showPackage Content(Optional):P 1# package: 5*Drill Bits2# package: 7*Drill BitsNote:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.