The Lot of 3 MTD 490-105-F017 9" x 9" Tri-Arc Edger Blades is a high-quality replacement part for Troy-Bilt lawn mowers. Made by the trusted brand MTD, these black blades come with a 3-month manufacturer warranty for added peace of mind. The blades are designed to provide precise edging for your lawn, making it easy to maintain a clean and well-manicured appearance. With a durable construction and compatibility with various Troy-Bilt models, this pack of blades is a convenient and reliable choice for your yard care needs.