The body of these planes are ribbed to ensure strength and rigidity. The machined faces of the frog bed firmly onto similar machined faces on the body of the plane and then fastened in position by 2 screws. This positive positioning helps prevent chattering. The cut iron is made of high carbon steel, hardened and tempered under scientific control for accuracy and uniformity. Handle and knob are hardwood. This tool is a traditional finishing or smooth plane. Can also be used as an all-purpose plane for a variety of work.