XHT BLADES Extreme Hardness Toughness Replacement 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. By the way they are made in the USA! Hands down the ABSOLUTE best aftermarket replacement blade on the market! IMPORTANT: IF YOUR BLADE HAS TO BE 2" WIDE TO FIT IN THE BLADE HOLDER THIS BLADE WILL NOT WORK. Replaces the following OEM part numbers: 050155 LESCO 08899300 GRAVELY 1066 ROTARY 11234 GRAVELY 11234P1 GRAVELY 113579 TORO / WHEEL HORSE 30227 TORO / WHEEL HORSE 30227-50 DIXIE 30227-50 GRAVELY 3022750 GRAVELY 7-04510 PRIMELINE 8689 DIXON 88616 GRAVELY 8861651 GRAVELY 8899300 GRAVELY 9229 DIXON 9258 DIXON Blade specs Center hole: 5/8" Width: 2-1/2" Thickness: .197" Length: 17" 3 NEEDED ON 50" CUT 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.