The Swix Edge File Guide is made from hard Aluminum and designed to put a sharp side edge on your skis. A file or diamond stone can be used to sharpen the side edges for sharper, cleaner carves. Durable Hard Aluminum, Photo Shows the 88 Degree Bevel, Tool Type: Edge/Base Guide, Model Year: 2019, Product ID: 402142, Model Number: TA588, GTIN: 7045951905793