DescriptionThis is a HSS Spiral Step Cobalt Drill Bits. It is suitable for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc. HSS combined with a titanium coating. More capable and durable.Features- Color: As shown. - Material: High-speed steel. - Size: Approx. 7.7 x 1.3 x 1.3cm.-HSS combined with titanium coating. More capable and durable.-Suitable for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc. - No need for a pilot hole; Titanium coated to reduce friction and run cooler. - Automatically deburr holes as you drill. - Made of High steel, durable.