Overview Reviews Product Description Cobalt jobber drills offer increased hardness, toughness and better wear resistance compared to regular HSS Bright surface finish provides a polished finish and prevents chip building, galling and welding on a workpiece 135° Degree split point (self-centering) which eliminates "walking" and reduces the thrust force needed Parabolic flute design facilitates effective chip evacuation for deep hole drilling Suitable for a wide range of ferrous and non-ferrous materials Clarkson Osborn Catalog Product Videos Custom Field Diameter 3.8mm Flute length 43mm Overall length 75mm Package quantity/sold as each 10 Product Reviews Write a Review Write a Review × Clarkson-Osborn 3.8mm Cobalt Parabolic Flute Jobber Drill Bit DR11638 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *