The Nicholson mill hand file with ergonomic handle is 12" long, has a rectangular shape, and has single-cut coarse (also called bastard) American pattern teeth on the sides and edges for sharpening mill or circular saws and draw filing with a rough finish. The file tapers slightly toward the point to ease access into grooves. The file has single-cut American pattern teeth for sharpening and deburring, and square edges for filing sharp corners. An attached rubber-coated handle provides an ergonomic grip.
Hand files are used to remove material and smooth and shape workpieces. They have forward-facing cutting teeth and cut when pushed over either a stationary or rotating workpiece. Single-cut teeth have single rows cut diagonally across the width of the file. Double-cut teeth have two sets of rows cut in opposite directions. American pattern files have three coarseness grades. Coarse, also known as bastard cut, is suitable for efficient, heavy material removal where finish is not a concern. Medium, also known as second cut, offers average material removal and finish quality. Fine, also known as smooth cut, provides the smoothest finish. Swiss pattern files have eight coarseness grades, from 00 (coarse), 0 (medium), and 1 to 6 (fine to finest), offering a smoother, more precise finish than equivalent American pattern files.
Nicholson manufactures hand tools and power tool accessories. The company is headquartered in Sparks, MD.