XHT Lawnmower Blades 20-1/2", 5/8", NOTCH - B1DC1501 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 60" cut. Center Hole: 5/8" Length: 20-1/2" Thickness: 0.25 Width: 2-1/2" Replaces: B1SB6083R SUNBELT Crossed From: 051424 LESCO 060487 LESCO 1-633483 EXMARK 103-2530 EXMARK 1032530 EXMARK 10667 ROTARY 1633483 EXMARK 30277-60V DIXIE 303-152 STENS 303152 STENS 355-036 STENS 355-331 STENS 355036 STENS 355331 STENS 6083 ROTARY A-633483 EXMARK 91-264 OREGON 91-506 OREGON 91264 OREGON Fits: Exmark Lazer Z and Turf Ranger models. Dixie Chopper SEVERAL (60") Exmark SEVERAL (60") A physical address must be provided, NO PO BOXES. Aftermarket product. Thanks for looking!