Why ProPartsPlace? Fastest Shipping! Reasonable Prices! Great Feedback! Excellent customer service! 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! This sale is for 3 replacement HEAVY DUTY XHT blades. Save on 9 blades! Search eBay item number Replaces the following OEM part numbers: TORO 110-6837-03 112-9759-03 115-5059-03 Takes 3 blades for 50" machines Center Hole: 5/8" Width: 2-1/4" Thickness: .165" Length: 17-1/2"