20 Inch Mulching Blade 2105300125A, Lawn Mower Blade Replacement for Daye, Hyper Tough, Murray Walk-Behind Mower Deck, Fit MNA152505 MNA152701 MNA152516, Replaces 212-9903, 355-101 (1 Pack)

What It Is

This is a 20-inch mulching blade (part number 2105300125A) designed for walk-behind mowers, specifically for Daye, Hyper Tough, and Murray models. It replaces OEM numbers 212-9903 and 355-101, and is a direct fit for deck models MNA152505, MNA152701, and MNA152516. Use it for fine grass clipping mulching to reduce bagging needs.

Fitment & Compatibility

• Deck size: Must be a 20-inch cutting deck—measure your deck’s width from blade tip to blade tip.
• Models confirmed fit: Daye MNA152505, MNA152701, MNA152516; Hyper Tough and Murray walk-behinds with the same 20-inch deck and center hole pattern.
• OEM vs aftermarket: This is an aftermarket replacement for Murray OEM 212-9903 and 355-101. Not guaranteed for other brands—check your mower’s model number.
• Measurements: Blade length 20 inches, center hole diameter typically 7/8-inch (common for walk-behinds), and thickness ~0.125 inches. Verify your mower’s blade mounting bolt size (usually 5/8-inch or 7/16-inch).
• What to check: Confirm your blade adapter/driver is compatible—some older Hyper Tough models use a star-shaped adapter. Remove your old blade and compare the center hole shape and offset.

Key Things to Know

• Installation difficulty: Easy—requires a socket or wrench. No special tools beyond a blade removal tool or block of wood to lock the blade.
• Mulching vs. bagging: This blade has a curved, wind-tunnel design for fine mulching. Not ideal for leaf collection or discharge; may leave clumps in wet grass.
• Quality: Made from heat-treated steel; sharp out of the box but may dull faster than OEM on rocky lawns. Check for balance before installing.
• Gotcha: The center hole fits many walk-behind mowers, but not all—some Murray models use a 5/8-inch hole. Measure yours to avoid returns.

Should You Buy It

Buy this if you own a Daye, Hyper Tough, or Murray 20-inch walk-behind mower needing a mulching blade, and you want a budget-friendly replacement that matches OEM specs. It’s a solid choice for mulching fine grass on small to medium lawns, but skip it if your deck uses a different hole pattern or you need a high-lift blade for bagging.