This is an anti-rotation screw. The lower handle clip on many devices, including lawn and garden equipment and tools, holds an anti-rotation screw. With use, over time, or because of other damages, the screw may be broken or stripped. When this occurs, a replacement anti-rotation screw is required to keep the machine secured together correctly for safe use.The replacement of an anti-rotation screw is quick and easy. A Torx screwdriver is recommended for replacing the part. Allow the machine to cool completely before working with it. Wear protective gloves for safety always. Remove a stripped or worn out screw if there is one present before securing in the new part to the lower handle clip.This anti-rotation screw is a genuine OEM part. It is sourced from the manufacturer. The replacement part is sold as an individual unit. The piece is made from high-quality, durable metal. It can be used in a variety of brands, including Ryobi, Troy-Bilt, MTD, Bolens, Yard-Man, Yard Machines, and Cub Cadet. The anti-rotation screw is compatible with many models of blowers, cultivators, edgers, snowblowers, trimmers, vacuums, and other tools and lawn and garden equipment.