2105200317A Mower Blade 21", with Oval Center Hole, Compatible with Murray Daye HyperTough Mower, Fit for MNA152701 MNA152901 MNA152903, Replace 2105200317 84005221, 2 Pack

What It Is

This is a 21-inch replacement blade with an oval center hole, designed for walk-behind lawn mowers from Murray, Daye, and Hyper Tough. It’s a direct OEM-style replacement for cutting grass on residential lawns.

Fitment & Compatibility

Before buying, confirm three things:

1. Deck size: Your mower must have a 21-inch cutting deck (measure blade tip to tip, not deck shell).
2. Center hole: Oval shape, 5/8” x 7/16” – common on Murray/Hyper Tough mowers. If your current blade has a round hole, this won’t fit without modification.
3. Model numbers: This replaces OEM part 2105200317 and 84005221. It fits mower models MNA152701, MNA152901, and MNA152903. Check your mower’s model number (stamped under seat or on deck) for exact match.

Not compatible with most Craftsman, Troy-Bilt, or MTD mowers that use a star or diamond center hole.

Key Things to Know

• Pack includes two blades – good for a dual-blade mower or a spare.
• Installation difficulty: Easy – 1/2” socket and torque wrench recommended (tighten to 40–50 ft-lbs).
• Quality: Medium-carbon steel, pre-sharpened. Edge holds well for 1–2 seasons on average lawn.
• Gotcha: Oval hole orientation matters – align the flat sides with the blade adapter. Reverse mounting will cause wobble and poor cut.

Should You Buy It

If you own a Murray, Daye, or Hyper Tough mower with a 21-inch deck and an oval center hole, this is a solid, affordable replacement. The 4.6-star rating and two-pack value make it a safe bet for DIY homeowners. Avoid if your mower uses a different hole shape or if you need heavy-duty mulching blades.