Features 1、Wide Application: Ideal for cutting through metal, wood, plastic and thin iron plate (hardness <25 degrees). 2、4PCS Countersink Drill Bit: 4pcs countersink drill bits chamfer range are 2‑5mm, 5‑10mm, 10‑15mm, 15‑20mm. 3、90 Degree Angle: 90 degree angle on the point for incisive and precise countersinking, used for workpiece circular aperture chamfering or cone hole. 4、Usage Scenarios: Fit for DIY, home and general construction, the chamfer cutter can also be adaptive to engineering purposes. 5、High Quality Materials: Made of high quality high speed steel, rust proof, strong and durable, and not easy to damage. Specifications Item Type: Countersink Drill Bit Material: High Speed Steel Color: As shown in the picture 2-5: Chamfer Range: Approx.2-5mm / 0.08-0.20in Shank Diameter: Approx.6mm / 0.24in Head Diameter: Approx.9.7mm / 0.38in 5-10: Chamfer Range: Approx.5-10mm / 0.20-0.39in Shank Diameter: Approx.8mm / 0.31in Head Diameter: Approx.14mm / 0.55in 10-15: Chamfer Range: Approx.10-15mm / 0.39-0.59in Shank Diameter: Approx.10mm / 0.39in Head Diameter: Approx.21mm / 0.83in 15-20: Chamfer Range: Approx.15-20mm / 0.59-0.79in Shank Diameter: Approx.12mm / 0.47in Head Diameter: Approx.28mm / 1.10in Weight: Approx. 183g / 6.5oz Application: Workpieces with hardness below 28°, such as aluminum parts, iron plates, plastics, PV panels Package List 4 x Countersink Drill Bit