Constant thickness along their entire length. Even at its narrowest point, the Thunderweb core is thicker than a standard drill bit.Characteristics:Parabolic tissue cross section: Large tissue thickness with built-in strength.Flute Geometry - The Thunderweb flute form quickly launches hot chips. It dissipates heat better, increasing the life time.Division point 135 ° - Precision start, the drill does not walk on the material surface.The polished finish reduces friction and extends the life of the drill.Impact-resistant ABS case with extra rubber protection at the corners.Accepts higher supply pressure and torque equivalent to fewer breaks.Contents:THUNDERWEB HSS-G (19 pieces), with ø 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7 , 5, 8, 8.5, 9, 9.5, 10 mm.