SCITOO 3 Pack Lawn Mower Blade for 21 inches Fit for Craftsman SPM209370365 for Cub Cadet 742-04276 742-0741 742-0741-0637 942-0741 for MTD 742-0741 742-0741-0637 742-741 942-0741 942-0741A

What It Is

This SCITOO 3-pack replacement blade set is designed for 21-inch walk-behind mower decks. It’s intended for standard mulching or bagging use on Craftsman, Cub Cadet, and MTD models, offering a cost-effective alternative to OEM blades.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: Only fits 21-inch cutting decks. Measure your deck width (not blade length) to confirm.
• OEM part numbers: Cross-reference with your mower’s manual. This set matches Craftsman SPM209370365, Cub Cadet 742-04276, 742-0741, 742-0741-0637, 942-0741, and MTD 742-0741, 742-0741-0637, 742-741, 942-0741, 942-0741A.
• Center hole & bolt pattern: These are universal-fit blades with a standard 1-inch center hole and 5-point star pattern. Measure your existing blade’s center hole and bolt pattern to be sure.
• Blade length: Blades are 21 inches tip-to-tip. If your OEM blade is exactly 21 inches, these are direct replacements. If it’s slightly different (e.g., 20.5 or 21.5 inches), they won’t fit.

Key Things to Know

• Aftermarket quality: These are budget-friendly replacements, not OEM. Expect slightly thinner steel and less precise balancing. You may need to balance them yourself before installation.
• Installation difficulty: Easy. Use a socket wrench and blade removal tool. Torque bolts to 30-40 ft-lbs. The blades are not marked for top/bottom, but the sharp edge should face upward toward the deck.
• Common gotchas: The “3 pack” means you get three identical blades—not a set for a three-blade deck. These are for single-blade 21-inch mowers. If your mower uses two or three blades, this pack won’t work.
• Durability: Fine for residential use (small lawns, occasional mowing). Not recommended for commercial or heavy-duty use—blades may dull faster or bend on rocks/roots.

Should You Buy It

Buy this if you need a cheap, quick replacement for a single-blade 21-inch Craftsman, Cub Cadet, or MTD mower and don’t mind doing your own balancing. Skip it if you want OEM durability, need blades for a multi-blade deck, or mow rough terrain frequently. At $22.50 for three, it’s a solid value for budget-conscious homeowners.