12 in. 2-in-1 Trimmer AND Edger

MODEL # ST4500

  • Black & Decker’s electric lawn and garden equipment releases zero emissions in your yard, helping to reduce your carbon footprint
  • 3.5 amp motor is ideal for trimming weeds, grass and overgrowth
  • 12 in. cut path with bump-feed spool gets the job done fast
  • Groom 'N' Edge™ converts from trimming to edging in seconds
  • Edge guide allows precise edging along sidewalks and driveways
          2 stars 30 Reviews Print This Page
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Product Details

Key Features

  • 3.5 amp motor
  • 12 in. cut path with bump-type feed spool
  • Groom 'N' Edge™
  • Edge guide
  • Built-in auxiliary handle
  • Cord retention system


  • Ideal for trimming weeds. grass and overgrowth
  • Gets the job done fast
  • Converts from trimming to edging in seconds
  • Precise edging along sidewalks and driveways
  • Comfort and control
  • Prevents Accidental Cord Disconnection


  • trimming grass in hard to reach areas where mowers cannot cut
  • maintenance edging along hard surfaces

Technical Specifications

  • Amps3.5 Amps
  • rpm10000 rpm
  • Cutting Swath12 "
  • Line Diameter0.065 "
  • Replacement AccessoriesRS-136
  • Weight4 lbs
  • Power SourceCorded

2 Year Limited Warranty

Black & Decker (U.S.) Inc. warrants this product for two (2) years against any defects in material or workmanship. The defective product will be replaced or repaired at no charge in either of two ways.

The first, which will result in exchanges only, is to return the product to the retailer from whom it was purchased (provided that the store is a participating retailer). Returns should be made within the time period of the retailer?s policy for exchanges (usually 30 to 90 days after the sale). Proof of purchase may be required. Please check with the retailer for their specific return policy regarding returns that are beyond the time set for exchanges.

The second option is to take or send the product (prepaid) to a Black & Decker owned or authorized Service Center for repair or replacement at our option. Proof of purchase may be required. Black & Decker owned and authorized Service Centers are listed under "Tools-Electric" in the yellow pages of the phone directory.

This warranty does not apply to accessories. This warranty gives you specific legal rights and you may have other rights which vary from state to state or province to province. Should you have any questions, contact the manager of your nearest Black & Decker Service Center. This product is not intended for commercial use.

LATIN AMERICA: This warranty does not apply to products sold in Latin America. For products sold in Latin America, check country specific warranty information contained in the packaging, call the local company or see the website for warranty information.


    Ratings & Reviews

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    User Reviews for 12 in. 2-in-1 Trimmer AND Edger

    0 people recommended the following review
    Gwennyk Wrote:
    Piece of crap!!!
    I was very disappointed with it. I thought that B n D was supposed to make quality products, but after this, my opinion has greatly changed. I bought this product, at the end of the season, in 2011, and due to medical reasons, I did not get around to using it until 2013. When I did, I was only able to use it for a few minutes, until the line broke. I followed the directions, in the manual, for refeeding the line, so I was able to use it again, for a few minutes before the line again broke. I expected much better for something straight out of the box. I've set it aside and have not bothered to use it since. It's too much of a hassle!

    The idea of it.


    Line keeps breaking.

    6/29/2014 11:37:34 AM

    0 people recommended the following review
    Planeforme Wrote:
    This product work effortlessly for me.
    I didn't have ANY problems with this trimmer.




    4/17/2014 4:25:34 PM

    0 people recommended the following review
    holt5150 Wrote:
    Like it...was what i was looking for.
    I like the how powerful it is and how light weight it is and inexpensive. I wanted a replacement for a tiny Toro and couldn't find the model so this was the closest I could find.

    How light weight it is and easy to use since I am a 45yr old disabled woman that cant use anything heavy, but still want to work in the yard!


    that I had to go in for an exchange because the trigger was intermittent. So just got a new one today. 4/10/14 I opened it up and so far it works.

    4/10/2014 4:11:01 PM

    0 people recommended the following review
    C-4 Wrote:
    pretty easy
    I ordered the black and decker weed eater and I found it very easy to set up and use. I also bought a 100ft extension cord.

    It was easy to set up. Easy to use. Easy to feed the line. Easy to bump. Easy to plug in. A well made machine and proved functional.


    All Good!!!

    10/16/2013 12:49:06 PM

    0 people recommended the following review
    Jothon91 Wrote:
    Love it
    Tackled a bigger job then I thought it would. Very affordable and strong! Great buy I am very satisfied

    Strong, light weight


    Have to keep it plugged in, no biggie for my small lawn

    9/18/2013 8:55:25 PM

    0 people recommended the following review
    flmom3 Wrote:
    string won't feed
    I bought this today at my local Lowe's store because of the price. I read reviews on the store site but apparently I didn't read them ALL because there is a major flaw in the line feed on this machine. I only need something to trim around my trees where my mower can't reach and also to edge around my driveway and sidewalks. I trimmed around my tree and had to feed the line. Bumping the machine as instructed didn't work so I had to pull the line until it popped and fed more line. I finished the tree and then I turned the machine over in order to edge my driveway. I didn't realize the line needed refeeding again until the edger function wasn't working. No matter what I did, it simply would NOT feed the line. I read more reviews and found out that apparently there is a defect in the line feed. I don't need the hassle of a machine that needs constant refeeding. I returned in within an hour of buying it. B/D really needs to do something about this.



    line will not feed

    9/1/2013 2:02:01 PM

    0 people recommended the following review
    emorgan Wrote:
    DO NOT WASTE YOUR MONEY ON THIS PRODUCT! This thing was never able to cut more than one foot of grass without the line breaking. And of course it broke inside, so you have to disassemble the thing re-thread the line and go another foot and do it all over again. Took me 30 minutes to cut a 22 foot fence line. Black and Decker used to be a quality product for the homeowner, but I shall never purchase another B&D product again. B&D should be ashamed of having their name on such an inferior product such as this. It is said that you get what you pay for. In this case all I got was a 22.00 piece of junk that is now on its way to the landfill. DO NOT BUY THIS TRIMMER. The only thing it trims is your wallet

    Absolutely nothing. Wish I had never bought it!


    Everything. Not worth the cost of the box it came packaged in.

    8/10/2013 1:07:33 PM

    0 people recommended the following review
    UnhappyWeeder Wrote:
    Unhappy with purchase
    I bought this trimmer in 2012 after always having positive experiences with Black and Decker products. I was so disappointed. From the beginning, this product has not performed as I had expected. After a few minutes of continuous use, upon releasing the trigger, I had difficulty 'restarting'. I thought it was my power cord and changed cords and outlets. Same thing. The motor sounded as if it was struggling...almost like it was overheating. I suffered through last summer using this trimmer and put the thing back up in the shed for the winter. This year, I had high hopes that it was user error and got the trimmer back out. This past weekend, I struggled so much with the spool (stuck twine), that I finally threw the darn thing away and went and bought a Ryobi. After 5 seconds, yes, I counted, of use the twine would get stuck and once again the trigger would not stay on. VERY DISAPPOINTED with this product. I would not recommend buying this.

    It was cheap. Don't waste your money. Save and buy a more expensive brand.


    spool, twine, motor, trigger, not a good product

    7/7/2013 9:58:14 AM

    0 people recommended the following review
    VAMOMOF3 Wrote:
    What a piece of crap. I just spent over an an hour on a job that should have taken 10 minutes: trimming along the curbing in front of my house, going around 3 trees and a rose bush, and up and down my sidewalk. IT TOOK THE ENTIRE SPOOL! I had to stop at least 15 times to rethread the spool because it broke off inside. I should have used scissors instead!!! I bought this product because of faith in the Black & Decker name. I will not buy another B&D product based on my experience with this one. DO NOT waste your money.

    Nothing...it's more trouble than good. Use scissors instead, it'll save you some time.



    6/29/2013 2:26:55 PM

    0 people recommended the following review
    GreenQueen Wrote:
    I regret buying this
    Read the instructions, inserted the cartridge, turned it upside down and plugged it in, not noticing that the power cord was touching the trigger - the trimmer started up and ripped apart my lower leg. The line breaks constantly and I have to constantly open it up to fix the line. It's actually faster to trim the grass edges with a hedge trimmer.

    It looks pretty when it's hanging in the garage.


    Constantly having to fix the line because it constantly breaks off inside the trimmer. I used to automatically trust the Black & Decker brand but now I'll read the reviews on products before I buy anything with their name on it.

    5/26/2013 7:22:40 PM

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