7-3/16" X 4" X 3/8" Blade, 3-hole, Reversible

7.2 Inch Long by 4 Inch Wide by .375 Inch Thick...

9" X 4-1/2" X 5/8" Blade, 4-hole, Reversible

9 Inch Long by 4.5 Inch Wide Aftermarket Replacement Brush Chipper...