Long Series Twist Drill Bit 8.5 x 165mm HSS Ground

Total length - 165mm Flute length - 109mm Point cut - helical point Point angle - 188deg Helix angle - 20-30deg For steel and cast steel alloyed and unalloyed up to approx 900Nmmm strength, grey cast, malleable cast iron, die cast metal, iron sinter, nickel-silver, graphite cast iron, short-chipping aluminium alloys, bronze & brass