ARTU Tungsten Carbide Tipped Drill Bit Set Round Shank 13 Pc

The special negative back grinding enables the tip to bore with a filling action, not cutting and chrome vanadium steel shank for enormous strength and flexibility. The blend and high tech bonding of cobalt and tungsten carbide allows bit to withstand temperatures up to 2000 degree.Conforms to ANSI standardsFor use on glass, plexiglass, ceramic tile, cast metal, hardened steel, soft wood, hard wood, granite, marble, fiberglass, brick, masonry, concrete and PVCFor rotary or percussion drillingSpecial negative back grinding enables the tip to bore through materials with a filing action, not cuttingCobalt and tungsten carbide tip allows bit to withstand temperatures up to 2000 degrees FChrome vanadium steel shank has enormous strength and flexibilityFlat bottom parabolic flute for faster waster removalWorks ideally for cordless drills, corded drills and drill pressesRequires no center punch – eliminates walkingResharpens on a high quality silicon carbide grinding wheel