Suitable for general drilling of steel, stainless steel, copper, aluminum and other surfaces This is a type of HSS steel large step cone drill titanium drill fixed hole milling cutter. It is made of high quality HSS steel and coated with titanium to reduce friction and heat. Very suitable for cutting holes in various materials, including steel, brass, wood, plastic, etc.
Step drill Material: High Speed Steel (HSS) with Titanium Nitride coating
