Description <br> perfect for making countersunk countersunk holes and countersunk holes for plugs. <br> The countersinks are carbon steel, the surface is titanium coated, sturdy and durable, not easy to rust, long service life. <br> This kit is suitable for DIY at home and daily use, it allows to drill easily and effectively, without burr. <br> Universal size compatible with all types of drill, drilling machines, including vertical drilling machine, and another common milling cutter. <br> Used in hardness 25 under the part, such as carbon steel, sheet metal, insulation boards, PVC board, wood <br> <br> For the 90 ° chamfer piece hole or conical hole, the chamfer edge edges and angles of the treatment angle <br> Can be completed finished the treatment of the cone for one time. Applicable to the small cutting process. <br> Neat edges, smooth, no broken edge, small resistance to chamfering, high precision in the hole, more durable <br> Flute with big chip, fast for the elimination of chips <br> Three of medium for laborious, each force of the blade smaller, high efficiency and more durable <br> Specifications: <br> Handle: round handle <br> Color: Gold + Silver <br> Material: High speed steel <br> Surface treatment: titanium coated <br> CUT: <br> Diameter of the head * Diameter of the stem * Length <br> 6.3MM: 6.3MM * 5MM * 37MM <br> 8.3MM: 8.3MM * 6MM * 40MM <br> 10.4mm: 10.4mm * 39MM * 6MM <br> 12.4mm: 12.4mm * 10MM * 46MM <br> 16.5mm: 16.5mm * 47mm * 10MM <br> 20.5mm: 20.5mm * 47mm * 10MM <br> <br> Package Contents: <br> 8Pcs * Three Chamfering Drilling <br> <br> Only the above package content, other products are not included. <br> Note: Light reflection 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. <br>