High Speed Steel TMX Interchangeable Pilot Counterbore with Straight Shank.HSS TMX Interchangeable Pilot Counterbore, Straight Shank, 3 Flute, 9/16″ cutting diameter x 1/2″ shank diameter x 3-1/16″ shank length x 4-5/16″ OAL with 3/16″ pilot hole diameter for pilots 1/4″ to 1/2″.
For counterboring and spotfacing – interchangeable pilots provide the advantage of one counterbore size can be used for a number of pilot hole diameters
