REPLACEMENT 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! Don't waste your money on the cheapest set you can find on eBay unless you want a cheap blade that will not perform! (3) needed for 48" cuts Center Hole: 3/4" Width: 2" Thickness: .187" Length: 16" Medium Lift Replace the following part numbers TO16AMOW MORE 10-6637TORO / WHEEL HORSE 106078TORO / WHEEL HORSE 106637TORO / WHEEL HORSE 2001ROTARY 350-124STENS 350124STENS 50-1880WINDSOR 501880WINDSOR 7-04563PRIME LINE 704563PRIME LINE 91-806OREGON 91247LASER SALES 91806OREGON **DISCLAIMER- WE LIST BLADE PART NUMBERS, MODEL NUMBERS AND DIMENSIONS FOR REFERENCES BUT IT IS UP TO YOU TO BUY THE RIGHT BLADES. If you order them and they don't fit it is not our fault! We always except returns but the shipping to and from will be your responsibility unless we make the error.