Free Shipping and No Hassle Returns
Free Shipping
We offer free shipping on orders over $199.*
No Hassle Returns
Don’t like it? Send it back. It’s that simple.*
Same Day Shipping
Most orders ship same day if placed by 5PM EST (M-F)
*Restrictions Apply. See Details »
Model#: DEWNDCST990B

What are the different product conditions?

Brand new items;Full manufacturer warranty available
Manufacturer inspected, repaired and tested items; CPO 60 day money back guarantee
Open Box
New or Recon items with possible minor cosmetic damage; CPO 60 day money back guarantee
Returned items inspected, repaired and tested by CPO technicians; CPO 60 day money back guarantee

Dewalt DCST990B 40V MAX XR Cordless Lithium-Ion Brushless 15 in. String Trimmer (Bare Tool)

  • Dewalt DCST990B 40V MAX XR Cordless Lithium-Ion Brushless 15 in. String Trimmer (Bare Tool)
  • Note: Battery & Charger sold separately
Sale Price:
You Save
Free Shipping
(continental U.S.)
In Stock
Ships Today


The DEWALT DCST990B 40V MAX Lithium-Ion XR Brushless 15 in. String Trimmer (Bare Tool) features a brushless motor that provides more runtime and longer life with a more efficient and more durable motor. It has a patented gear drive design that provides more torque and maintains cut speed under load. This is contained within a metal gear case for better durability for heavy use. The impact-resistant Xenoy housing offers maximum durability for every day usage. It has a variable speed trigger which gives you precise speed control when needed with power and performance to tackle thick growth, as well as a padded auxiliary handle that offers comfort for long use. This trimmer has a dual 0.080 in. line with a bump feed head that gives the user control over the feed rate, along with a 15 inch cutting swath to help you get the job done faster.
  • 15 in. cutting swath with 0.080 in. line (also accepts 0.095 in. line)
  • High-efficiency brushless motor maximizing run time and motor life
  • Patented gear drive design that powers through overgrowth
  • Variable trigger with Hi/Lo speed control for added power or extended runtime
  • Part of the 40V MAX system of Outdoor Power Equipment
  • 40V MAX XR Cordless Lithium-Ion Brushless 15 in. String Trimmer (Bare Tool) - DCST990B
  • Bare Tool - Batteries and Charger Sold Separately


Series: 40V MAX
Cordless: Yes
Weight: 13 lbs.
Batteries Included: Bare Tool
Battery Type: Li-Ion
Cutting Width: 15 in.
Line Diameter: 0.080 in.
Line Feed System: Dual Line Bump Feed
No-Load Speed (RPM): 0 - 6,600
Speed Settings: 2
Voltage: 40V



There are no reviews for this item. Write Review

Questions & Answers

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 2 questions Browse 2 questions and 2 answers
What is the run time of the 40V battery?

Is the 13 # weight include the battery?

Thank you
Jon on Jul 4, 2016
BEST ANSWER: Roughly around 30 mins
how much difference between 20v and 40v lithium string trimmer?
EMS on May 12, 2016
BEST ANSWER: 40v is heavier, more power and run time.