These drills are made from powdered metal, which is a mixture of various metals that have been fused together under high pressure. This unique composition gives these drills excellent strength and durability, making them ideal for drilling in tough materials like cast iron, stainless steel, and high-temperature alloys.  Powdered metal drills will offer substantial better tool life compared to HSS and Cobalt drills.

Materials Suitable for Nachi Powdered Drills • Stainless Steels • Alloy Steels • All Aluminum Alloys • Carbon Steels • Cast Irons • Structural Steels • Brass & Bronze Nachi PM drills offer these features • Convenient common size "endmill shanks" reduce runout • 4 facet split point for better drilling and centering • Multi layer SG (Tin + TiCN) coating