Features:* The drill bit has 2 functions of reaming and chamfering, which can improve the processing efficiency, and the angle of the second degree is 180 degrees or 90 degrees.* For example, for drilling 2 holes, installing hexagonal nut, etc. it can replace more than one drill bit.* The countersunk head is made of HSS, which can process metal or non-metal products below 30 degrees HRC, such as cast iron, tool steel, copper and aluminum, alloy steel, iron, die steel and so on. Specifications:Product Name: Spiral Step DrillMaterial: M35-CoColor: GoldOptional Steps: 90, 180Optional Size: M3, M4, M5, M6, M8, M10, M12Suitable for: drilling, chamferingQuantity: 1 PcPackage Content:1 × Spiral Step DrillNote:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.