REPLACEMENT XHT BLADESExtreme Hardness ToughnessReplacement XHT Lawnmower blade. XHT(Xtreme Hardness & Toughness) blades are 25-40% harder than standard lawnmower blades. Benefits of the HXT blade are sharper and longer lasting cutting edges. More resistance to bending. Tighter tolerances in the aftermarket vs. OEM. XHT blades also offer greater impact toughness.*****This sale is for 3 replacement HEAVY DUTY COMMERCIAL MULCHER PREDATOR blades. It takes 3 to replace a 50" cut machine Replaces the following OEM part numbers:CUB CADET/ MTD 742-04053 742-04053A 742-04053B 742-04053C 942-04053A 942-04053B 942-04053 C490-110-C123 490110M126 Center Hole: 6 POINT STAR MAKE SURE YOU DO NOT NEED THE 3/4" ROUND HOLE BECAUSE CUB CADET HAS IT BOTH WAYS! This will not fit the round hole style! Width: 2-1/2" Thickness: .187" Length: 17.9" Â· Disclaimer: We list model numbers and part numbers for references only. At times the same model may take different parts based on serial number breaks or manufacturers specifications. We list all the specifications on the part (size, width, length, thickness, etc.) and YOU must know what is needed on YOUR application. We canÂt possibly make it more known as to what you are receiving when you purchase.