The ERGO Razor sidewall planer is essential for preparation of side edge filing. It is common for a file to be compromised by cutting into the sidewall of a ski. It is very important to remove the sidewall material to avoid loading files with plastic and to keep the sidewall from interfering with the bevel on the edge. The razor has an ergonomic design that fits into the palm of the hand. It is adjustable and can be used with both the right and left hands. It comes with a round cutting blade.