Some of the Dominys' work required the drilling of large holes in wood. In making pumps, wagon, mill, and woolen-wheel hubs, a tool that would help to enlarge a small hole was quite useful. The reamer served that purpose.

Sometimes only one edge of the reamer was sharpened, but often both edges were bezeled. In either case, the edges pared the sides of a hole already cut by an auger. The dowels in the handle of the longer reamer provide extra leverage for turning the blade. They are removable, suggesting that the holes enlarged by this tool were deeper than the lowest dowel. An iron collar, or ferrule, was probably added to the lower end of this reamer's handle after it had split.