Craftsman SBD 21 inch 3-in-1 Blade. Blade will mulch, Bag and side discharge grass.
Fits Deck Size: 21 in.
Center Hole: Round Hole, 0.64 in
Width: 2.25"
Blade Type: 3-in-1.

Replaces part #159267, 532-159267, 165833, 532-165833, 175064, 532-175064, 189028, 532-189028, 406712, 532-406712, 7133276, 7133524
Used on Mowers:
Fits Craftsman, AYP, Ariens, Husqvarna, Poulan, Poulan Pro and Weed Eater walk-behind mowers