1. Wide Application: suitable for workpieces with hardness lower than 65HRC, such as stainless steel, aluminum plate, carbon steel, thin iron plate, insulated plate, PVC plate, wood plate, etc. 2. Excellent Material: high-speed steel material, that can process a variety of hard metals, improved blade so that the tool life doubles. 3. Easy to Use: An automatic through-hole chamfering milling cutter can quickly trim and chamfer both sides of the hole in seconds. 4. Sharpening Function: The blade can be sharpened and easier maintenance methods allow the tool to be sharpened without unloading. 5. High Efficiency: It adopts a one-piece design, it is more convenient to generate chips during the chamfering process, and it will not delay the working efficiency due to clogging of the cutter. Application: It is suitable for use in the work-piece which the hardness is under 25 degrees, such as aluminum sheet, thin iron plate, the insulatuing board or PVC board. Type: Countersink Drill Bit Degrees: 90 Colour:As Shown Material:High Speed Steel Package Contents: 1 * 50mm 90 degree straight handle 3-edge chamfering knife Only the above package content, other products are not included. 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.