4.5mm Ruko Cobalt Drill Bit

Total length - 80.0mm Flute length - 47.0mm Point cut - from 3.0mm with split point DIN 1412C Point angle - 130 deg Surface - Golden Brown Like HSS-G plus cobalt alloyed. The cobalt ensures increased heat resistance. Application areas - for unalloyed and alloyed steel (up to a strength of 1100 N/mm2), hot and cold-working steel, reinforced and case-hardened steel and also steel resistant to rust and acid.