The Truper Dual-Wheeled Rotary Edger is designed to trim grass that grows over the edges of paved driveways and sidewalks. The serrated blades cut through grass and sod with ease to keep your yard neatly landscaped. The blades on this manual edger are self-sharpening for continual cutting so it won't bog down after prolonged use. California Prop 65: This product can expose you to chemicals including Diisononyl phthalate (DINP) & Nickel compounds,which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov."