Keep your mower performing at its best with this set of 3 premium replacement mulching blades. Designed specifically for 60-inch cut decks and compatible with models F620, F687, F735, and M665, these blades are precision-engineered to match the specifications of part number M131958. The mulching design helps break down grass clippings into fine particles that return nutrients to your lawn. Each blade in this set is crafted from durable steel to deliver clean, consistent cuts and withstand regular use. Installation is straightforward - simply remove your worn blades and mount these direct-fit replacements. Regular blade replacement helps maintain optimal cutting performance and protect your mower's engine from unnecessary strain. This complete set provides everything needed to refresh your 60-inch deck's cutting system.