8TEN LawnRAZOR Mower Blade for Exmark Toro P21 Trim 21 inch Deck 108-3762-S 108-3762-03 108-0954-03 (High Lift)

What It Is

The 8TEN LawnRAZOR Mower Blade is a high-lift replacement blade designed for 21-inch walk-behind mower decks, specifically for Exmark and Toro models that use the P21 Trim or similar commercial/residential mowers. Its high-lift profile creates stronger airflow to improve grass clipping discharge and bagging performance.

Fitment & Compatibility

• Deck size: Only fits 21-inch decks. Measure your blade length (21 inches) and center hole diameter (typically 7/8-inch on these models).
• OEM cross-reference: Replaces Toro/Exmark part numbers 108-3762-S, 108-3762-03, and 108-0954-03.
• Model check: Confirmed fit on Toro TimeCutter, Super Recycler, and Exmark Lazer Z (21-inch deck), plus the P21 Trim series. Verify your mower’s blade spindle pattern (usually a 5-point star center hole).
• Aftermarket note: This is a third-party blade, not OEM. It should match OEM dimensions, but always compare the center hole shape and blade thickness (0.1875 inches typical) against your original.

Key Things to Know

• High lift = more power draw: The aggressive lift angles require more engine power. Works best on mowers with 5+ HP; may bog on smaller engines in thick grass.
• Installation tip: Use a torque wrench set to 30–40 ft-lbs. Do not overtighten—stripping the spindle is common with high-lift blades.
• Durability: 8TEN blades are heat-treated steel with a corrosion-resistant coating. Expect similar lifespan to OEM, but inspect for bending if you hit debris.
• Balance check: Always balance the blade before mounting. Unbalanced high-lift blades cause vibration and spindle wear.

Should You Buy It

If you own a 21-inch Toro or Exmark mower with a P21-style deck and want better bagging or discharge performance than standard blades, this is a solid, affordable upgrade. Skip it if you primarily mulch or have a low-horsepower mower—the high lift can strain the engine and reduce cut quality in wet grass.