T3100 09 | C.K Tools Split Point Drill Bit, HSS, 9mm | Distrelec Germany Size (diameter): 6 mm and 8 mm. Wide application: spot welding drill bit for easily cutting spot welded sheet metal without deformation of the sheet, suitable for thin stainless steel sheet, iron sheet or other thin sheet. Shaft type: round shaft. Welding Spot Drill T3100 09 | C.K Tools Split Point Drill Bit, HSS, 9mm | Distrelec Germany Dremel Accessories HSS Twist Drill Bit ¯9.5mm SUITABLE FOR:Ideal spot weld cutter for DIY enthusiasts and professionals such as carpenters, plumbers, electricians, etc. Specification: Material: HSS CO. Milwaukee 6.8mm ThunderWeb Metal Drill Bits Pack. Milwaukee 4932352392 for side mills, end mills, carbon steel, alloy steel, tool steel, cast iron and titanium surface treatment.