Dormer A777 HSCo Heavy Duty Jobber Drill 4.20mm OL75mm WL43mm DOR420COB

General description A777 Metric Cobalt Jobber Drill Bits are designed for heavy-duty applications, featuring a 135° split point that is ideal for drilling tougher materials, particularly in the Aerospace Industry. Technical specifications Tip diameter: 4.20 mm Working length: 43 mm Overall length: 75 mm 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°), 1.50 mm and above (135° split point) Surface Treatment: Bronze Material: HSCo Cobalt steel Standards: DIN 338 RN / BS328 / ISO 235