Twist drill made of high-speed steel (4241) with hardness 62°HRc (+/-2°) and with point angle 118°,
straight cut without thinning, good for hand grinding.
Spiral dextrorotatory drill, spiral type N, hot rolled forged, with a high flexibility and torsional strength,
with grinded drill margin. Diameter tolerance h8.
Cylindrical shank matching drill's diameter.
Suitable for general purposes, for alloy and carbon steels treatment with hardness up to 250Bhn,
for grey cast iron, non-ferrous metals as well as hardened plastics.
According to DIN-338.