Kennametal SS25-FBHS-31 ModBore Finishing Boring Head 25mm Shank Swiss Made. I will list the ranges below for reference only. Please review photos to determine condition and identification. Cartridge not included R31FBHS06 1.216" to 1.579". 0004 or 30.9mm to 41.1mm.
Cartridge not included F38FBHS06 1.492" to 1.854". 0004 or 37.9mm to 47.1mm.