Sorby TurnMaster Excelsior Cutter, Round is a tough and extra-long lasting cutter designed for Robert Sorby's versatile TurnMaster Tool. This round titanium nitride (TiN) coated cutter is i for smoothing, shaping, and internal waste removal. The titanium nitride coated Excelsior tips deliver crisp detail and a fine finish, combining the characteristics of plain high-speed steel with the added toughness and prolonged edge life provided by the TiN coating, which has a hardness rating of Rc 90. This makes it a reliable and durable choice for precision woodturning tasks. Model Number: RSTM-GT1