Professional 4PCS HSS Countersink Chamfer Tool Set - Precision Deburring for Metal & Wood Key Features: ✔ High-Speed Steel (HSS4241) construction for extended durability ✔ 4-size set (6mm/8mm/10mm/12mm) covers countersink holes 2-20mm ✔ Smooth chamfering & deburring in one operation ✔ Compatible with metal and wood workpieces (aluminum, PVC, insulation boards) ✔ Industrial-grade precision for batch processing Technical Specifications: Material: HSS4241 (62-64HRC) Shaft Type: Round (grooved/non-grooved variants included) Temperature Limit: <25°C for optimal performance Why Choose This Set? Deburring tool set eliminates sharp edges safely Countersink bits create perfect conical holes Woodworking drill bits with smooth chip removal Metalworking compatible for versatile use Includes.