8TEN LawnRAZOR Mower Blade for Husqvarna HU550F HU550FH HU675FE HU725E HU725FH 580244001 580244002 (Toothed) 3 Pack

What It Is

The 8TEN LawnRAZOR is a toothed replacement blade set (3-pack) designed for select Husqvarna walk-behind mowers. It’s built for mulching or bagging grass in residential lawns, using a serrated edge to chop clippings finer than standard straight blades.

Fitment & Compatibility

• Exact models: Husqvarna HU550F, HU550FH, HU675FE, HU725E, HU725FH.
• OEM cross: Replaces Husqvarna part numbers 580244001 and 580244002.
• Deck size: Fits 21-inch cutting decks only. Measure your deck width before buying.
• Center hole: 7-point star (7/8-inch diameter). Confirm your spindle matches this star pattern; round-hole spindles won’t work.
• Blade length: 21 inches (tip to tip). Check your old blade’s length with a tape measure.
• Thickness: 0.140 inches (standard residential grade). Not for heavy commercial use.

Key Things to Know

• Installation difficulty: Easy. One bolt per blade (usually 5/8-inch or 15mm socket). Torque to 40-50 ft-lbs—don’t overtighten.
• Toothed vs. straight edge: Serrated blades cut finer but dull faster on sandy soil or tough weeds. Expect to sharpen more often than straight blades.
• Balancing: These are often pre-balanced, but check with a blade balancer after install. An unbalanced blade vibrates and damages the spindle.
• 3-pack value: Cheaper per blade than buying singles, but if you only need one, you’ll have spares for future swaps.

Should You Buy It

If you own one of the listed Husqvarna models and want better mulching or bagging performance than standard blades, this 3-pack is a solid budget-friendly upgrade. Skip it if you mow large, rough areas or prefer a straight edge for clean cuts on thick grass.