Get longer service-life and more productivity out of your cutting-tool investment by keeping blades sharpened. Great for kitchen, hunting and utility knives, scissors, shears, pruners, trimmers - even hoes and shovels. (For most effective sharpening, spindle speed should be greater than 900 RPM.) Hardened steel shank, tough nylon blade-guard and long-life fine-grit grinding stones. One-year warranty and Jack's Tool Shed worry-free Satisfaction Guarantee.