Universal sharpener ERGOâ„¢ SKU: 41-100 for sharpening axes, knives etc. made of durable, impact-resistant polycarbonate an ergonomic design offers a secure, convenient and safe grip of the sharpener a base with rubberized feet ensures stability of the sharpener during sharpening a sharpening wheel made from a specially selected blend of silicon, a material for highly demanding applications