The Swix Edge File Guide is made from hard Aluminum and designed to guide a file to put sharp side edge on your skis. A file or diamond stone can be used to sharpen the side edges for sharper, cleaner carves. This file guide is set at 87 degrees. Durable Hard Aluminum, Strong racing file guide- 87 degrees, 11kg, Tool Type: Edge/Base Guide, Model Year: 2022, Product ID: 496884, Model Number: TA587, GTIN: 7045951905809