SC21 21" mower blade replaces Scag blade 48111, A48111, 481708, 482879 on Scag 61" decks. Scag Zero-Turn, Cheetah, Turf Tiger, Wildcat, Freedom, Advantage. Order (3) blades for 61" cut. 15-3434 is similar to Oregon blade 91-626, Stens 340-117, Sunbelt B1SC3802. Also fits Ferris blade 5101755, Husqvarna blade 539-105711, Snapper blade 5101755BMYP, Wright blade 71440003. Refer to your parts manual to match by OEM#