IDEASURE 21" High-Lift Mower Blades for 42" Deck — 2-Pack Thick Steel, Star 5-Point Fit

These IDEASURE 138971 high-lift replacement blades are a 2-pack of heavy-gauge steel 21" mower blades designed to restore powerful suction and clean cutting on 42-inch decks compatible with Craftsman, Husqvarna and Poulan tractors.

If your lawn tractor’s cut quality has slipped or the bagging performance is poor, swapping in a matched pair of high-lift blades is one of the fastest ways to recover pickup and even clipping discharge. Each blade in this set is made from one solid piece of thick steel, sized for 42" decks, and finished to resist wear so you get predictable performance across hours of mowing.

How do these blades improve cutting and collection?

High-lift blades are shaped to create stronger upward airflow under the deck, which helps lift grass upright before cutting and moves clippings efficiently into the bag or chute. With sharper edges and consistent thickness, these replacements deliver a more uniform striping and cleaner discharge.

• Designed for 42" decks to optimize airflow and lift
• 21" length, 2-1/4" width, 0.157" thickness for stable cutting
• Star 5-point center hole ensures secure fit on compatible spindles
• Thick single-piece steel reduces flex for straighter cuts

Will these blades fit my mower model?

These blades replace part numbers including 532138971, 134149, 138498 and several others, and fit a range of Craftsman, Husqvarna and Poulan models with 42" decks. Always verify the blade length, center hole pattern and deck size before ordering to confirm compatibility.

• Compatible examples: Husqvarna YTH18542, YTH22V42, LTH152
• Craftsman fits include LT1000, YT3000 and YS4500 families
• Poulan/Pro fits include PXT16542 and PR17542 models
• Check your current blade for 21" length and 5-point star center hole

How durable are these replacement blades?

Built from a single forged piece of heavy gauge steel, these blades resist bending and edge deformation so they hold cutting geometry longer than thin stamped alternatives. Proper sharpening and balanced installation will extend life and maintain a smooth cut.

• Premium thick-steel construction for reduced flex and wear
• Pre-finished edge profile for immediate use and even cuts
• Sold as a matched pair to preserve deck balance and vibration control
• Simple maintenance: inspect, sharpen, and rebalance as needed

How do I install and maintain these blades safely?

Installation is straightforward for anyone comfortable with basic mower maintenance: disconnect spark plug, raise and support the tractor, remove old blades, and torque the mounting bolts to manufacturer specs. Routine inspection for nicks and straightness plus periodic sharpening keeps cutting clean and reduces engine load.

• Always disconnect spark and support mower before blade work
• Replace both blades as a pair to maintain deck balance
• Torque mounting hardware to your tractor’s specified value
• Sharpen edges and check for straightness every season

Who is this for: Lawn owners and small property managers running 42" deck lawn tractors who need a two-blade replacement kit to restore bagging, side-discharge or mulching performance. This IDEASURE 138971 set suits users of Craftsman, Husqvarna and Poulan tractors who want heavy-duty, reliably sized blades (21" x 2-1/4" x 0.157") with a 5-point star center hole for a secure fit. Verify your mower’s deck size and center mount pattern before purchase to ensure a perfect match.