5pcs Countersink End Mill Cutter Slot Drill Bits Tool M3 M8 4 Flutes HSS-AL

1、Mill cutters are made of hard high speed steel usually used to be assembled on milling machine 2、Suitable for milling of copper aluminum steel cast iron etc 3、High toughness abrasion resistance high-speed cutting for the high hardness 4、Can processing directly or fine processing to the heat treatment mold 5、Reduces times of changing tools improves machine actuator movement efficiency and save mold making time