Blade Length: 21-1/2"
Center Hole: 1/2"
Make sure and measure blade to insure proper fit, length can vary 1/8" either direction.
It fits Universal one for all lawn mowers
Includes for adapter bolts to fit the majority of lawn mower machines
center hole adaptor sizes- 10mm / 12.7mm / 16mm / 18mm
It also includes two heavy duty washers
Set of 6