Compatible with Cub Cadet, Ho-nda, Lawn-Boy, Lawnmaster, Also for Ore-gon, Scotts, Snapper, Toro, Troy-Bilt and other brand Lawn Mower. Product Information: Product included 1 x 5-point stars, 1 x 6-point stars, 1 x 7-point stars, 1 x "t-shirt" holes and 1 x "bowtie" holes (which also fits rectangular holes), Also come with 1 x Universal precision mower blade balancer. The Lawn Mower Blade Balance Adapter Set Solves the problem where you use a blade balancer when sharpening mower blades but some blades won't center properly on the balancer's rounded steps. The Universal mower blade balancer Balances lawnmower blades after sharpening, for reduced vibration and engine wear. Different types of balancing adapters enable the product to be universal for most brands of lawn mowers, mower balancers can verify unbalanced and bent blades, and the combination of products can effectively prolong the service life of lawn mowers and make lawn mowers cut grass more smoothly. 5 Pcs Lawn Mower Blade Balance Adapter with Precision Blade Balancer Compatible with Stihl O-regon Troy and Most Lawnmower Blades for Outdoor Courtyard Garden Grass