HO-117 Threaded nut DIN 6499. RH rotation. With tapered flange for Termwood machines.HO-137 Threaded nut DIN 6388. For Homag, Weeke, Anderson, CR Onsrud, IMA. With standard nut for RH rotation.HO-138 and HO-139 Threaded nut DIN 6388. For Homag, Weeke, Anderson, CR Onsrud, IMA. Complete holder with ball bearing nut for running both LH and RH rotation.HO-143 and HO-145 Balanced to 40,000 RPM at G2.5. Designed for high speed working operations.HO-147 and HO-149 Threaded nut DIN 6499.HO-162 Best accuracy and precision. Balanced to G2.5 at 24,000 RPM. Concentricity ? 0.003mm. Cutting tool shank must have tolerance h6 with cylindrical shank (no flats).