Mower Blade 21.25" long x 2.00" Wide x .37"ID Center Hole. 2 outer holes oblong at .38" wide x .93" long and are approximately 2.75" center. CW Rotation. 57209 stamped into blade. Noma.
Mower Blade 14.37" long x 2.00" wide x .75"ID hole x .20" thick. Clockwise. Allidin UWH5, Toro 106108 and 106635 is a set of 3. Blade is stamped 106108.
Mower Blade 20.50" long x 2.50" wide x .75"ID center hole, outer holes .38"ID. CW. 1720679 supersedes to 1687014. This is part number 1720679 new OEM Simplicity.