This is a Multi Tool that was created by Darby , so it is named after him.
Small Octagon Reamer 1-10 taper , with a 1" x 2" x 1/2" graphite Pad below it.
Choose either a Wood or Aluminum Handle.
ADD Counter Balance for $10.00 more.
If you ever need a replacement Small Octagon , you can buy that separately.
See "Octagon Reamer Replacement heads"