Alpen Hss super long drill bit. - Diameter x length / spiral: 3.00 x 100 / 70 mm. - Precision grinding, minimum tolerances, maximum concentric precision. - Accurate milling due to optimized sharpening of the tip. - Made of highest quality steel. - Breakage resistant, due to controlled heat treatment. - Suitable for construction steel, easy-to-cut steels, non-alloy steels, copper, brass, aluminum and plastic. |