Dormer A777 HSCo Heavy-Duty Jobber Drill 10.50mm OL:133mm WL:87mmA777 Metric Cobalt Jobber Drill Bits have a heavy duty, 135 split point for use when greater heat is generated during drilling, e. g on higher tensile tougher materials and in particular the Aerospace Industry. Specification Flute Geometry: Standard Helix, Right hand spiral, Thick Web Point Angle: 0. 30 mm 0. 95 mm 118 Conical point 1. 00 mm to 1. 40 mm inclusive 135 4 facet point 1. 50 mm and above 135 split point sizes (Split point geometry to NAS