What drill heads are used to drill holes in diamond heads?
General screw drill or tungsten steel, tungsten steel twist drill.
A drill bit (Drills) is a tool used to drill through holes or blind holes in solid material and to expand existing holes.
The commonly used drills are mainly twist drills, flat drills, center drills, deep hole drills and casing drills. Reaming drill and countersink drill is not in solid material drilling, but it is also customary to put them in a bit.