DIN1869 long type hss drill bit

DIN1869 Long Type HSS TWIST DRILL BIT1.Profile ground2.Right-hand cutting, type N3.In all rotary and percussion drilling machines4.Drill set is availbleHigh speed steel (HSS): harder than steel blades; stay sharper longer.HSS Cobalt: Extremely hard and dissipate heat quickly. They are most commonly used for boring in stainless steel and other metals.packing•5/10 pieces packind in PVC bag, then in white paper box, then in carton.•We can supply the product in single pcs as well