Great quality entry level blade. Built with aircraft grade 7000 series aluminum structure and adaptable to various boot mount spacing. Sold With cups (mounting brackets). Chrome tool steel 58rc. The blades have received a special treatment in order to reduce the friction to a minimum. Precision ground blades to 1,10 mm Aluminum 7000 series tube for optimal flexibility; stable and yet easy to control Cups 7000 serie aluminum silver anodized tubes.