SUNBELT BLADE-MOWER, 21-1/4", 6PT Star - B1CC1426 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. (2) blades for 42" cut. Fits models LTX1040. 2-in-1 blade for either discharging or bagging. Center Hole: 6 pt. Star C to C: 2.-1/2" Length: 21-1/4" Outer Hole: 5/16" Thickness: .156 Type: High Lift Width: 2-1/2" This is an Aftermarket part. Thanks for looking!