Improved Version Lawn Mower Blade Sharpener (5005,Black), Blade Balancer Replace 339075B Lawn Mower Blade Balancer Magnetic Wall Mount 42-047 (Red)

What It Is

This is a two-in-one magnetic wall-mount blade sharpener and balancer combo (models 5005/339075B/42-047) for walk-behind mowers and small tractors. It lets you sharpen and balance a blade without removing it from the mower, then store the tool on any steel surface.

Fitment & Compatibility

• Deck size: Works with blades up to 22 inches long and 2.5 inches wide. Not for zero-turn or commercial decks over 48 inches.
• Brand fit: Universal for most walk-behind mowers (Toro, Honda, Craftsman, John Deere) with standard center hole diameters (1/2" to 5/8"). Not for offset or multi-hole blades.
• OEM vs aftermarket: Replaces OEM part numbers 339075B and 42-047. Aftermarket design—no fit issues reported on standard blades.
• Check before buying: Measure blade length, width, and center hole size. Verify your deck has a steel surface (magnetic mount won’t stick to aluminum or plastic decks). Ensure blade is not bent or heavily chipped—this tool is for light sharpening only.

Key Things to Know

• Quality: Magnetic mount holds well on clean steel, but magnet strength is moderate—don’t rely on it for heavy blades over 22 inches. Sharpening stone is basic; expect slower work on dull blades.
• Installation difficulty: Easy—no tools needed. Stick mount to deck or garage wall, then sharpen blade in place. Balancer works by sliding blade onto the cone; ensure blade is clean and dry for accurate balance.
• Common gotchas: The balancer cone can wobble if not seated flat. Sharpen evenly on both sides to avoid uneven wear. Magnetic mount may lose grip if deck has paint or rust—wipe area clean first.
• Durability: Plastic components may crack if dropped. Not for commercial use—fine for 1-2 mowers per season.

Should You Buy It

Buy this if you have a single walk-behind mower and want a simple, space-saving way to sharpen and balance blades without removing them. Skip it if you have a large deck, commercial mower, or need heavy-duty sharpening—you’ll outgrow it fast.