Type: Spiral Carbide Drill Bits with 2-Way Cut for Countersink. Made of: Premium Solid Fine Grain Tungsten Carbide - Imported Material. Diameter shank diameter: 3.175mm. Cutting edge diameter: 3.175mm. Cutting length: 22mm. Total length: 40mm . Suitable materials: cutting - Milling on: MDF panels, chipboard, panels with insulation, log fixed to the panels acrylic, PVC, resin, plastic, chipboard, composite, melamine board solid wood, wood, plywood, lotus tray Suitable for : CNC machining cutter, woodworking machine, CNC milling cutter, etc. Features: Combination of upper and lower blades - Sharp ends. High precision grinding and polishing - Resistance to abrasion and high temperature - Good rigidity - Not easily broken. No burr for up and down spiral machining. Good performance - Improve work efficiency - Reduce cost. Features or Dimensions available: Name: 2 countersink drill bits. Available dimensions (in mm): 3.175 mm. DDC: cutting diameter LBC: edge length of cut LT: total length Contents: Set of 5 pieces. Condition: top quality product. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.