Feature: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.Specification:Item Type: Countersink Drill BitMaterial: High Speed SteelColor: As shown in the picture2-5:Chamfer Range: Approx.2-5mm / 0.08-0.20inShank Diameter: Approx.6mm / 0.24inHead Diameter: Approx.9.7mm / 0.38in5-10:Chamfer Range: Approx.5-10mm / 0.20-0.39inShank Diameter: Approx.8mm / 0.31inHead Diameter: Approx.14mm / 0.55in10-15:Chamfer Range: Approx.10-15mm / 0.39-0.59inShank Diameter: Approx.10mm / 0.39inHead Diameter: Approx.21mm / 0.83in15-20:Chamfer Range: Approx.15-20mm / 0.59-0.79inShank Diameter: Approx.12mm / 0.47inHead Diameter: Approx.28mm / 1.10inWeight: Approx. 183g / 6.5ozApplication: Workpieces with hardness below 28°, such as aluminum parts, iron plates, plastics, PV panels.Package List:4 x Countersink Drill BitNote:1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.