Compatible with 50+ battery trimmers! Including most popular Black & Decker and Crafsman models. View Compatibility Chart

String Spool Upgrade

Elevate your trimmer!

Give your battery trimmer new life by replacing your existing cap and spool with the innovative Snap & Trim™ String Spool Upgrade kit from Aero-Flex®.With aerodynamically designed and engineered Aero-Flex® line blades that simply snap into place, you can say goodbye to spools, springs, rewinding, rethreading, and snarls and say hello to greater efficiency, power, and energy.

String Spool Upgrade

Elevate your trimmer!

Give your battery trimmer new life by replacing your existing cap and spool with the innovative Snap & Trim™ String Spool Upgrade kit from Aero-Flex®.With aerodynamically designed and engineered Aero-Flex® line blades that simply snap into place, you can say goodbye to spools, springs, rewinding, rethreading, and snarls and say hello to greater efficiency, power, and energy.

Saves Time & Effort

Easy Reload

More Grass Cut Per Charge

Swap your old trimmer cartridge with the Aero-Flex® Snap & Trim™system and get rid of trimmer line hassles for good!

Aero-Flex® Snap & Trim™ Fits Most Popular Models!

Our Aero-Flex® Snap & Trim™system is designed to fit 50+ Black & Decker and Craftsman battery trimmer models. Double check your trimmer’s compatibility and watch tailored instructional videos in our manufacturer's table below.

Don't see your make or model? Drop us a line and our team will get back you to in a snap.

BLACK & DECKER

Compatible Models

BCASK890E1

BEST935

BESTA510

BESTA512

BESTE620

CST1000

CST1100

CST1200

CST2000

GH400

GH500

GH600

GH610

GH900

GH912

LCC140

LCC221

LCC222

LCC2223ZP

LCC340C

LST1018

LST120

LST126

LST136B

LST140C

LST201

LST220

LST300

LST400

LST420

LSTE522

LSTE523

LSTE525

MTC220

MTE912

NST1018

NST1024

NST1118

NST1810

NST2018

NST2118

PS76110A

ST6600

ST7000

ST7200

ST7700

ST7701

ST8600

CRAFTSMAN

Compatible Models

CMCST900D1

CMCST910M1

CMEST900

CMEST913

CMESTHOS912

CMST915C1

BLACK & DECKER

Compatible Models

BCASK890E1

BEST935

BESTA510

BESTA512

BESTE620

CST1000

CST1100

CST1200

CST2000

GH400

GH500

GH600

GH610

GH900

GH912

LCC140

LCC221

LCC222

LCC2223ZP

LCC340C

LST1018

LST120

LST126

LST136B

LST140C

LST201

LST220

LST300

LST400

LST420

LSTE522

LSTE523

LSTE525

MTC220

MTE912

NST1018

NST1024

NST1118

NST1810

NST2018

NST2118

PS76110A

ST6600

ST7000

ST7200

ST7700

ST7701

ST8600

CRAFTSMAN

Compatible Models

CMCST900D1

CMCST910M1

CMEST900

CMEST913

CMESTHOS912

CMST915C1

No Tools Conversion Makes Install a Snap!

Stop wasting time rewinding and rethreading traditional trimmer line. Replace your old cap and cartridge with our Snap & Trim™ String Spool Upgrade with replacement line blades that install in 15 seconds for a seamless, stress-free (and tangle-free) job. Guaranteed.

1.

Remove your trimmer's old cap and cartridge.

2.

Load two (2) Aero-Sharp® line blades into your new Aero-Flex® cap.

3.

Snap the Aero-Flex® cap and glider into trimmer head.

4.

Trim! And get the job done with battery power to spare.

Troubleshooting Guide

Installation

Compatibility Check

Before Purchase and Install, Make Sure:

  • That your trimmer is listed in our compatibility chart, here.
  • Don't see your make or model? Drop us a line at info@aero-flex.com and our team will get back to you in a snap.

Quick Checks!

Before Operating, Make Sure You Have:

  • Removed the original cap and spool.
  • Loaded two Aero-Sharp® line blades over cap posts, under retainer hoods, and into slots.
  • Installed two (2) cutters for proper balance.
  • Installed Snap & TrimTM assembly into open receiver head windows.
  • Properly aligned the cap to fully close.
  • Aligned the cap guide with the old string outlet boss. (Cap installs only one way with cap guide over string outlet boss.)
  • Assured both cap fingers are fully seated and engaged before operation.

Detailed Instructions

Need Further Assistance?

  • Follow our tailored instruction video for compatible Black & Decker and Craftsman trimmer models on our Youtube channel. 
  • Drop us a line at info@aero-flex.com and someone will be in touch to assist with any additional inquiries you may have.

Operating

Safety

To Keep Yourself and Others Safe While Operating, Be Sure To:

  • Operate only when then trimmer's grass shield is in place.
  • Wear protective eyewear.
  • Keep bystanders away.

Trimming

Using Your New Snap and TrimTM System is Simple, To Get Started:

  • Rest the trimmer's glider on the grass and cut through grass while moving the trimmer in any direction.
  • The cut height is pre-set for fool-proof, even trimming. For a lower cutting height, tilt the trimmer on the glider.

Balance

For Proper Balance, Be Sure To:

  • Always run the Snap and TrimTMsystem with two (2) cutters for proper balance.

Overheating

To Prevent Motor Burnout, Be Sure To:

  • Slowly and gently feed the trimmer into the cut to avoid overloading the motor.
  • Avoid rapid cutting or plunging the cutters into heave vegitation.
  • Do not remove the glinder from the trimmer. (Low cuts to the ground will increase operating watts and increase the chance of motor burnout.)

Pro Tip: Line Blade Care

Aero-Flex® Line Blades are best kept stored away from direct sunlight or extreme heat conditions. If possible, store in original packaging to keep from bending or warping.

String Spool Upgrade

Elevate your trimmer!

 

Available at Lowe's

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