[NewMontanaWorkshop]

Now tell us how this is used, give some details like what else do you have to have to make use of this and how is it adjusted and what does the adjustment do....... yes give us details.
Ed

Wood Boring Adjustable spade bit:

Need a drill press or auger handle:

Adjusted by loosening the screw and move the cutter bar closer/further from the center of the bit to bore smaller or larger holes.