Qibaok 6 pcs HSS Countersink Drill Bit Set 90 Degree 3 Flute Bits Titanium Chamfer Cutter Mill

* Ideal for making countersunk countersunk holes and countersunk holes for plugs * The countersinks are carbon steel, the surface is titanium coated, sturdy and durable, not easy to rust, long service life. * This kit is suitable for DIY at home and daily use, it allows to drill easily and effectively, without burr. * Universal size compatible with all types of drill, drilling machines, including vertical drilling machine, and another common milling cutter. * This set of 6 90-degree 3-edge drilling cutters is suitable for working on metal and certain non-metallic materials, such as coal steel, light iron, insulation boards, PVC panels, aluminum, wood hard and soft, etc.