BB 3xD Pro Drill Bit Internal Cooling Carbide CNC Hole Drilling Tool Efficient SUS Stainless Steel Alloy Diameter 1mm to 20mm Hole Diameter:15x16x65x115 25xD50xL50xd22

25xD50xL50xd22

3 D4 16  50  4T 4  1

ISO- International standard

4 6 22 62 118° -0

BB Tap drill（10pcs）

BB 3xD Pro Drill Bit Internal Cooling Carbide CNC Hole Drilling Tool Efficient SUS Stainless Steel Alloy Diameter 1mm to 20mm Hole Diameter:15x16x65x115 25xD50xL50xd22Please 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. The 3D Stainless Steel Drill Bit is a high performance drilling tool designed for a variety of metalworking applications. Below is an introduction to the 3D Stainless Steel Drill Bit: Double Edge Blade Head More Stable Centering The unique drill point angle ensures