Star Wheel or faucet style knob original for Delta or Rockwell 6 inch Belt or Belt Disc Sanders.
See the photo to verify type.
Vintage Hand Knob used on 17" Drill Press Return Springs and as Table Locks on 6" Jointers and more
Hand Knob for many Delta and Rockwell vintage machines with Serial #'s from DX-332 & after (fine thread).
For the Renovo version for the same knob for the later models with fine threads see 406-03-138-0003.