Use the Lansky Knife-Sharpening System Mount Accessories with all Lansky Sharpening Systems for a more hands-free sharpening experience. Durable two-piece aircraft-grade aluminum construction offers long-lasting performance. Available: Universal Mount Four screw holes allow for permanent surface mounting. 3.5H x 3.25 dia. Wt: 3.7 oz. C-Clamp Mount Can be attached to a bench-top or tabletop or other sturdy surface. 3.5H x 3.5W x 8L. Wt: 8.3 oz. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Sharpener Mounts.