BB Pro Drill for Stainless Steel 5D Hole Making Efficiency Bit External Internal Cooling 1mm-11.7mm Hole Diameter:8.1x61x103x10 Chamfered Round Shank

Chamfered Round Shank

Professional Drilling Widely Used

Versatile cutting performance for a wide range of materials

5 D10 40  150  4T 10R0

BB Pro Drill for Stainless Steel 5D Hole Making Efficiency Bit External Internal Cooling 1mm-11.7mm Hole Diameter:8.1x61x103x10 Chamfered Round ShankBB SUS Drill Please note that there are two types of drill bits: internal cooling (with cooling holes) and external cooling (without cooling holes). Please be careful to select when placing an order. Stainless Steel Buster Effortless drilling suitable for 304 Stainless Steel, High Hardness Steel Bar, Thick Steel Plate, Galvanized Iron Pipe, etc. Multiple Options External CoolingCenter through hole, better cooling effect, increased service life.