Features Efficient Manual Drill: The 102mm length hand twist drill allows for easy and flexible , enhancing productivity. 11Pcs in All: This set includes 10 twist drill bits in different specifications, catering to a Features: 1、Flutter Deburring: This drill bit taper is used for flutter deburring and slotted taper of countersinks, very practical and useful 2、Prevent From Clogging: Made of 90° HSS content, through groove chip removal can prevent chips from clogging the workpiece 3、Low Cutting Speeds: This hole cutter can get best results at low cutting speeds of steel, wood, plastic and light metals 4、Quickly And Easily: 4pcs counterbore and deburring tool set is for cutting metal, wood, and plastic quickly and easily 5、4 Different Specification: There are 4 specifications contain in the package, which is suitable for different using needs Specification: Item Type: Countersink Deburring Drill Bit Material: High speed steel Applicable Pore Size(approx.): 2 ~ 5mm / 0.08 ~ 0.2in 5 ~ 10mm / 0.2 ~ 0.39in 10 ~ 15mm / 0.39 ~ 0.59in 15 ~ 20mm / 0.59 ~ 0.79in Uses: Steel, wood, plastic and light metal Package List: 4 x Countersink Deburring Drill Bit Package List 4 x Countersink Deburring Drill Bit