Cutting Blade Lawn Edger Universal Attachment Edger Attachment Design: The Lawn Edger Attachment features a hardened steel cutting blade that is 9 in. It is used on Edge walkways, curbing, flower beds, and similar areas. Blade: 2 Teeth 9 In. steel TRI-ARC with A 1 In. arbor (center) hole. Note: Powerhead coupler accepts 1-inch AL diameter tube. Drive shaft connector: Square shape. .205” Female Attachment drive shaft: Square shape. .200” across flats. The constant torque gearbox is rugged and durable. Lowering the wheel decreases the cutting depth, while raising the wheel increases it. Universal Edger Attachment Compatibility: Fits Attachment capable units from Ryobi, Greenworks, Remington, Craftsman, Yard Machines, Troy-Bilt, Yardman, Snapper, Bolens, Murray, Kobalt, and most other major brands. Cutting Blade Lawn Edger Universal Attachment.if you have any questions, pls feel free to contact us. we will sincerely help customers solve questions.