Detail 10 pieces/lot combined countersink bits 60 degree drill center set Hss metal drilling power tools lathe milling cutter. These centring drill bits are made of high-speed steel, with high hardness and durable to use. Each centring drill has two-sided ends and a standard milling angle of 60°. The center is used to make tapered holes for the center of the lathe to hold the standard torsion drill in place to prevent the screw from slipping or deflecting. Used for parts that need to be machined between production centers or holding the center of the workpiece. Prefabricated precision positioning for hole processing, drilling guidance for hole processing, so reduce the error, central hole processing for the end surface of the shaft and other parts. High Speed Steel MaterialColor: SilverAngle: Standard 60 Degree Size(Includes 2 Sizes) :0.1x0.3cm,0.15x0.4cm, 0.25x0.6mm, 0.3x0.8mm, 0.5x1.2cmWeight: 121gPackage Included:10 x Hss Centering DrillOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.