This is a set of three blades from John Deere, designed to fit specific models of lawn mowers. These are original equipment blades, which means they are made by the manufacturer specifically for their machines. The blades are compatible with John Deere models that require TCU15881 blades. In addition to their compatibility, these blades are also designed for durability and efficiency in cutting grass. They are made from high-quality materials and are built to withstand regular use without easily becoming dull or damaged. Please note that this product may contain chemicals known to the State of California to cause cancer and reproductive harm, as specified by the California Prop 65 Warning on the packaging.