Please read this entire description before ordering!!! There are two different size blade pans used on the 2720 and 12720. This listing is for a set of 6 aftermarket rotary cutter blades for Bush Hog models 2720 and 12720 20′ mowers with 33.5 bolt circle blade pans. 2 clockwise rotating blades (90242 and 90242BH) and 4 counter-clockwise rotating blades (7556 & 7556BH). PLEASE COMPARE THESE MEASUREMENTS TO YOUR EXISTING BLADES. EACH BLADE WILL MEASURE 25 1/4 FROM THE CENTER OF THE HOLE TO THE TIP OF THE BLADE.