8TEN LawnRAZOR Mower Blade for AYP Craftsman Husqvarna 20 inch Decks 850972 145106 532850972 532145106 (Toothed)

What It Is

This is a 20-inch toothed (mulching) mower blade designed for AYP, Craftsman, and Husqvarna walk-behind mowers with 20-inch decks. It replaces OEM part numbers 850972, 145106, 532850972, and 532145106, and is intended for cutting grass and mulching clippings for nutrient return.

Fitment & Compatibility

Before buying, confirm your mower deck is exactly 20 inches (measure from blade tip to blade tip). This blade fits AYP, Craftsman, and Husqvarna models that use the OEM numbers listed—common on Craftsman 917 series and Husqvarna 115/120 series. Check your current blade’s center hole diameter (should be 1-inch or 7/8-inch) and the blade’s thickness (this is typically 0.125-inch). Verify the blade’s offset (usually 0.25-inch lift) matches your deck design. Aftermarket replacement; not a genuine OEM part.

Key Things to Know

• Quality: Heat-treated steel with a painted finish. Users report decent durability for residential use, but may dull faster than premium OEM blades on sandy or rocky soil.
• Installation: Straightforward if you have a socket wrench and blade removal tool. Torque to 40-50 ft-lbs. Ensure blade is oriented with lift side up (curved edge toward deck).
• Gotcha: The toothed design creates finer clippings but may clog in wet grass. Use only for mulching—not for bagging or side discharge unless your deck has a mulching plug.
• Balance: Out of the box, some users report needing to balance the blade with a balancer to avoid vibration. Check before installing.

Should You Buy It

Good value for budget-conscious homeowners with a 20-inch Craftsman or Husqvarna mower who want a mulching blade. Skip if you need a high-end, long-lasting blade for heavy commercial use or if your deck requires a specific OEM fit (e.g., for bagging).