A&I XHT 17", 5/8" Mower Blade (Single) - B1DC1500,1 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. (3) blades for 50" cut. (2) blades for 32" cut. Fits Gravely Pro 50 series. Center Hole 5/8" Length 17" Thickness .197 Type Medium Lift Width 2-1/2" Crossed From: DX-011 J. THOMAS DX011 J. THOMAS GR-50 J. THOMAS GR50 J. THOMAS 011234 ARIENS / GRAVELY 046998 ARIENS / GRAVELY 08866800 ARIENS / GRAVELY 08899300 ARIENS / GRAVELY 08899600 ARIENS / GRAVELY 09082400 ARIENS / GRAVELY 113579 TORO / WHEEL HORSE 113579-09 TORO.