- Carbide drill mills is an item that is growing in popularity with job shops, due to their versatile nature and ability to perform many machining operations without changing tools. An excellent choice for chamfering, as well as v-slot milling and limited spot drilling applications. Available in 2 or 4 flute drill bits, uncoated or ALTiN coated. These tools are standard with a 60 degree and 90 degree included angle point.