Milling Cutter, 5Pcs HSS AL M3 M8 4 Flutes Countersink End Mill Cutter Slot Drill Bits Tool for of Copper,Aluminum,Steel,Cast Iron

✔ 【Preminum Material】 - Mill cutters are made of HSS-AL super-hard high speed steel, hardness is HRC65 ~ 68 °, usually used to be assembled on milling machine. Mill cutters are made of hard high speed steel, usually used to be assembled on milling machine ✔ 【Milling Range】 - The countersink end mill cutter mainly used to cut such a hole allows the head of a bolt or screw. Suitable for milling of copper, aluminum, steel, cast iron, etc. ✔ 【High Precision】 - The mill cutter is a special made tool, and this kind of cutter cut hole and bottom hole with high alignment precision, can processing directly or fine processing to the heat treatment mold. ✔ 【High Efficiency】 - These countersink mill cutters are high production efficiency. Reduces times of changing tools, improves machine actuator movement efficiency and save mold making time. ✔ 【High Performance】 - High toughness, abrasion resistance, high-speed cutting for the high hardness, this cutter is usually used to be assembled on the milling machine.