Countersink bit, End mill, 5pcs HSS Step Countersink Bits, Metal Countersink Drill Bit, M3-M8 Cutter Slot Drill Bit Set, 4 Flute Cutting Drill Bit for Copper, Aluminum, Steel

General Description: The countersink and end mill set is a 5-piece kit designed to improve efficiency and reduce manufacturing time. Its design allows for quick tool changes and optimized machine actuator movement, which is essential for milling materials such as copper, aluminum, and steel. This kit is ideal for DIY projects at home and everyday use, enabling easy and efficient drilling without burrs. Technical Specifications Hardness: HRC65~68° Cutter Sizes: M3: 3.2*5.9*6*45mm M4: 4.2*7.4*6*48mm M5: 5.2*8.9*6*51mm M6: 6.2*10.4*8*58mm M8: 8.2*13.4*12*67mm Material: Ultra-hard HSS-AL high-speed steel Application End mills are specially designed for milling various materials, including copper, aluminum, steel, and cast iron. They are ideal for precision and finishing work, allowing for direct processing or fine machining of heat treatment molds.