Metal drill bit 7.8mm Co5% RUKO
Effective milled twist drill, made of durable steel - withstands high revolutions. A milled twist drill has a more accurate concentricity. Drill with cobalt impurities. Cobalt provides better heat resistance. Field of application: pure steel and its alloys (up to 900 N/mm² strength), hot and cold working steel, reinforced and hardened cementing steel, rust and acid resistant steel.