Nicholson 21701 Mill Bastard File with Handle Used for sharpening mill or circular saws Also for draw-filing and finishing metals Rectangular shape Single-cut on sides and edges 2 square edges All sizes taper slightly in width With handle Used for sharpening mill or circular saws, and for draw-filing and finishing metals Rectangular shape Single-cut on sides and edges, 2 square edges 10" long, tapers slightly in width