Oregon Exact Replacement blades are expertly designed to match the dimensions of the Original Manufactured Blade. Blades come pre-sharpened at the optimal angle to deliver continuous clean-cuts and keep your lawn looking healthy. Using a proprietary blend of steel and machine straightening, Oregon blades are not only durable, but perfectly balanced to deliver straight cuts, while resisting nicks and dings. Oregon designs for pros first, meaning our blades live up to all vegetation and are easy to sharpen. 2-1/4 In. width. Comes with adapters to fit 3/8 In., 7/16 In., 5/8 In., and 11/16 In. round and bow-tie center holes.