Upgrade 355-101 20" Lawn Mower Blades,Replace for 2105300125A Lawn Mower Blades (3 Pack) 20" Length, 0.125" Thickness, 2 1/4" Width, 1" x 3/4" Center Hole, Compatible with hyper tough Deck Lawn Mower

What It Is

This is a three-pack of 20-inch replacement blades designed for Hyper Tough push mowers and other compatible 20-inch deck models. They are a direct aftermarket alternative to OEM part 2105300125A, suited for standard residential lawn cutting.

Fitment & Compatibility

Before buying, verify these three measurements: the blade length must be exactly 20 inches, the center hole must be 1 inch by 3/4 inch (oval), and the thickness must be 0.125 inches. These blades are specifically marketed for Hyper Tough 20-inch deck mowers, but they can also fit other brands with the same blade dimensions and center hole shape. Check your current blade’s part number—if it ends in 2105300125A or is a Hyper Tough OEM blade, these will likely fit. Always measure your existing blade to confirm, especially the hole shape, as a wrong center hole will prevent proper mounting.

Key Things to Know

• Quality vs. OEM: These are aftermarket blades, so steel quality and balance may vary slightly from genuine Hyper Tough parts. Inspect for warping or burrs before installation.
• Installation Difficulty: Easy to install with basic tools (socket wrench). Lift the mower, remove the center bolt, swap blades, and re-torque to manufacturer specs (typically 30-40 ft-lbs).
• Common Gotcha: The 0.125-inch thickness is standard, but some mowers use 0.156-inch blades. If your mower has thicker blades, these will not fit the spindle.
• Sharpening: These are disposable blades—sharpen once or twice, then replace. The three-pack gives you two spare sets for future swaps.

Should You Buy It

If you own a Hyper Tough 20-inch mower and need a quick, affordable blade replacement, this three-pack is a solid value for the price. However, if you prioritize maximum durability or a perfect factory fit, consider OEM blades instead. For most residential lawns, these will cut fine and save you money.