Ideal for cleaning and finishing inside diameters, spot facing and recessed areas. Recommended for operations where balance is critical, as in CNC and robotic use. They can be use on portable air and electric tools. The same style is also available from stock in steel, stainless steel and other metallic and non-metallic fills. Applications: Deburring- Fuel rail bosses, fuel injector mounting bosses, and pockets in turbine engine combustion cases.