These blades are excellent replacements for the original blades Frontier / John Deere part number 5BP0006690. These brand new, uninstalled blades are 28 9/16″ long, 2 1/2″ wide, 1/4 inch thick and have a 3/4 center hole. These blades mount with a single bolt. Thanks for looking and please check out my feedback and other auctions.