Tools > Drilling > Jobber Drill Bits & Sets > Jobber Drill Bits | Sutton Tools Jobber Drill Bits - Heavy Duty Cobalt | Sutton Tools Heavy Duty Cobalt jobber drills are industrial quality for drilling materials that have high hardness and tensile strength such as cast iron, bronze, hardened steel & stainless steel. These drill bits feature a thick core for increased rigidity in hard materials. | Dimensions | Diameter (mm): 6.75mm | D1 (inch): 17/64 | Flute Length: 73mm | O/A Length: 105mm | Features | 135 split point (drills > 2mm & 3/32) enables accurate positioning and less drilling pressure | Thick core for increased rigidity in hard materials | Precision engineered parallel shank for accurate hole size | Made from HSS Co. The 5% cobalt formula improves abrasive & heat resistance, for increased strength at higher cutting temperatures | Colour Tempered surface finish enables identification of cobalt tool material | Specifications | Designation: NH | Material: HSS Co | Finish: Colour Temp | Max Cut Depth: 5 x D | Shank Form: A | Helix Angle: R30 | Point Tolerance: h8 | Point Angle: 135 | Point Form: Form C | Applications | Effective use on soft wood, hard wood, wood & nails, chipboard, plywood, MDF, green wood, sandwich construction, pallet, window frame, aluminium, copper/brass, sheet metal, PVC plastic and plasterboard. | Optimal use on steel, hard steel, stainless steel, cast iron, and metal pipe. | |