Series E100 HSS Straight Shank Extra Length Drills - Inch
For steels, cast steel, grey cast iron, malleable cast iron, nickel brass, aluminium alloy and graphite.
Point angle: 118°. Helix angle: normal.
Web thickness: standard.
Relief angle: 10°-20°.
Tolerance of diameter: h8.
Tolerance of shank: f11. To BS 328 : Part 1 : 1986.