Countersinks are used for deburring and/or counterboring existing holes in most materials.

However for hard and abrasive materials, the use of a TiN or TiAlN coated tool is recommended. There are also countersinks with specific geometry for the toughest materials.

Single-edge countersinks provide excellent roundness and are also used for centring.

Triple-edge countersinks are easy to regrind and work without vibration.

Multi-edge countersinks can be used for deburring and counterboring difficult to machine materials