1These center drill bits are used in metalworking to provide a starting hole for a larger-sized drill bit 2They can also be used to make a conical indentation in the end of a workpiece in which to mount a lathe center 3Made from high speed steel, these center drill bits are of high hardness and good wear resistance 4There are total 5 pieces center bits in this set that can be used to drill holes in different sizes 5Widely used on lathe machines, these center drill bits can cut easily and remove chips smoothlyFeatures: _x000D_These center drill bits are used in metalworking to provide a starting hole for a larger-sized drill bit. _x000D_They can also be used to make a conical indentation in the end of a workpiece in which to mount a lathe center._x000D__x000D_Made from high speed steel, these center drill bits are of high hardness and good wear resistance. _x000D_There are total 5 pieces center bits in this set that can be used to drill holes in different sizes. _x000D__x000D_Widely used on lathe machines, these center drill bits can cut easily and remove chips smoothly._x000D__x000D__x000D__x000D_Specifications: _x000D_Material: High speed steel _x000D_Angle: 60 _x000D_Cutting Edge Diameter_x000D_1.5mm_x000D_2mm_x000D_2.5mm_x000D_3mm_x000D_4mm_x000D__x000D_Shank Diameter_x000D_5mm_x000D_5mm_x000D_6mm_x000D_8mm_x000D_10mm_x000D__x000D_Length_x000D_35mm_x000D_41mm_x000D_45mm_x000D_51mm_x000D_60mm_x000D__x000D_Quantity: 5pcs _x000D__x000D__x000D_Package Includes: _x000D_5 x Center Drill Bits