Drill accurate center holes in material prior to turning, or use as a bit for accurate holes High speed steel (HSS) made, stable performance and and twisted drill make the drilling be more easy and effortless Straight shank design is more suitable for many electric drills and drilling machines Suitable for metal Accurate center hole drilling on material before turning, or as a drill bit for precise drilling. Dimensions 1mm / 1.5mm / 2.0mm / 2.5mm / 3.0mm / 5.0mm Inclination 60 Degree Material: HSS Color: silver How to use: 1. Traditionally, make a conical hole for the center of the lathe with centering and biting drills to create a starting point for standard twist drills to prevent the twist drills from traveling. 2. For processing between the center of the workpiece or production center components. Package Contents: 6 * Center drill bit Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.