Keep your mower operating efficiently with the MTD original equipment replacement 21-inch cut blade. MTD has made blade changing incredibly simple. All you will need is a wrench to loosen the blade bolt. This MTD blade fits premium 21-inch cut mower brands such as Yard Man Yard Machines Troy-Bilt Huskee Bolens and Craftsman units built in 1995 and after. It will also fit select Murray and Snapper units built in 2012 an after. MTD lawn mower blades are built tough to ensure they hold up against regular use. The center hold is star shaped.