Concrete Drill Bits, 9x (5mm-16mm), 160mm Long, Drill Bit for Concrete, Brick, Stone, Cement

contains 9 concrete drill bits with diameters of 5 mm, 6 mm, 6 mm, 8 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm. Total length 160 mm, usable length 100 mm. Put them in a PP box, you can use them easily. The drill bit has 4 cutting edges, the material of the cutting edge is high hardness YG8 cemented carbide and the material of the drill main body is chrome vanadium alloy steel. not only improves drilling performance, but also ensures that the drill bit does not get stuck on the steel. Self-centering tool tip for fast and accurate drilling. Double helix penetrating design can eliminate chips better and faster and reduce the wear of the drill bit when drilling at high speed. The round rod has 4 long and short slots, which are suitable for the most popular hammer drill on the market and are widely used for drilling stone, concrete, brick, etc.