
1. 6pcs 90 degree 3 blade countersink bit set is suitable for machining metal and some non-metal materials such as carbon steel, steel, thin iron, insulation board, PVC board, aluminum, soft hard wood, plastic, etc. 2. Titanium coated countersink drill bits are very sharp, high precision in peripheral machining and durable. 3. Specifications: Head diameter * handle diameter * length 6.3mm: 6.3mm * 5mm * 45mm. 8.3mm: 8.3mm * 6mm * 50mm. 10.4mm: 10.4mm * 6mm * 50mm. 12.4mm: 12.4mm * 8mm * 6.52mm 16.5mm * 10mm * 60mm 20.5mm: 20.5mm * 10mm * 65mm. 4. High-quality countersink drill bits can remove burrs well without leaving scratches and are compatible with various ordinary drilling equipment, including vertical drilling equipment. Model: Countersink Drill Bit Set HSS Chamfer Note: The data is all measured manually, please allow an error of 1-3cm. Due to the difference in light and display, there may be a certain color difference.