This very comfortable Conventional Wall Trimmer (also called Convention Back Carpet Trimmer) cuts in either direction and has a three position adjustable throat feature for carpets of varying pile height. Cutting height adjustments are made by using any of seven 1/16" thick shims. It is not necessary to remove the shims to adjust the throat depth. The metal handle is vinyl coated for comfort and has five working positions,, including a horizontal position for working under toe plates. Trimmer is supplied with 20 carpet trimmer blades and a plastic strip for mounting on the stainless steel angled wall runner to prevent wall markings. (Note: if used properly, this plastic strip is not needed). Other steel parts of trimmer are plated for rust prevention.