4 Flutes End Mill Bits, 5PCS HSS-AL Straight Shank Counterbore Drill Bits Set, M3-M8 Pilot Slotting Counterbore Mould End Mill Cutter - Product Features
- High Speed Steel Made of HSS-AL hard high speed steel, with high toughness, abrasion resistance, high-speed cutting for the high hardness.
- Professional Tool Mainly used to cut holes that allow bolts or screw heads to be screwed into. Can be processed directly or finely processed to the heat treatment mold.
- High Alignment Precision The end mill cutter cuts hole and bottom hole with high alignment precision. Due to its high production efficiency, it is commonly used in the machining industry.
- Improve Efficiency Reduce the time of changing tool, improve the efficiency of machine actuator movement, and save mold making time.
- Widely Use Counterbore end mill cutters are suitable for grinding copper, aluminum, steel, cast iron, etc. Usually used for assembling on a milling machine.