HSS-E Cobalt = hardness 65 HRC, to machine steels up to 1000 N/mm², cast iron up to 180 HB, copper, brass, bronze, aluminium.

To be used with standard drilling machines.

The centering point grants perfect drilling without any deviating. Thanks to the special sharpening the first sheet will be bored without damage for the second one. Their design allows an excellent penetration, a high resistance to the wear and a great many regrinds.