3.5 Amp 12 in. 2-in-1 Trimmer/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 33 Reviews Print This Page
Add to Wish List


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

    If you would like to review this product, please Sign Up or Log In

    User Reviews for

    3.5 Amp 12 in. 2-in-1 Trimmer/Edger

    0 people recommended the following review
    Dontbuythispieceofgarbage Wrote:
    Do not buy this tool.
    I thought it was a great buy: light, easy to use, safer than a blade. But what is the use of my expectations, when it doesn't work for the purpose? I also thought that Black and Decker was a reputable company. After this, I have to review my beliefs.

    Now that I know it, I do not like it at all. I just threw away $50 + tax. Plus my valuable and scarce free time and my effort.


    The line keeps breaking. It doesn't work. It is just another piece of new-looking garbage that will go to the landfill to burden the environment. Thanks, Black and Decker! Good job.

    9/24/2014 6:03:05 PM

    0 people recommended the following review
    dhammadawn Wrote:
    These used to be good
    350 amp weedeater/edger

    I love that they are cheap & replaceable every season as they don't last very long & the newer they are, the worst quality & less time they last


    The last 2 that I've purchased within the last year are a piece of crap. They vibrate, don't let the string out like the older ones did. I used to buy one of these every season or two and I could not believe the quality for the mere $29 that Lowe's sold them for. I've had at least 5 or 6 of these & all but the last two worked perfectly. Recently I used the last 2 I had bought & I needed to go back to the older one from a couple years ago to finish my project. Unfortunately, their quality (like everything else too these days) has gone way down and there is evidently no quality control at all these days. I'm hoping to get through the summer season with these 3 weedeaters & then I'll have to find another & it probably will not be Black & Decker as evidently they do not care about their products or customer satisfaction. I guess they want us to go to the more expensive ones which probably won't work any better.

    7/24/2014 5:54:39 PM

    0 people recommended the following review
    bdcg Wrote:
    I bought this because of the size and weight. I did not want a heavy weed cutter. I was very pleasantly surprised with the quality and performance of this cutter. It does the job for me.

    The price, size and weight. I've used it only once and it did an excellent job.


    1.The trimmer cord kept breaking, but I went back to Lowe's and they showed me how to properly install the cord. Will report back after a few uses to see if this works. 2.The instructions did not explain to my satisfaction, how to turn the trimmer for edging. (It wasn't clear to me that I had to place my hand on the silver pole and pull out and then twist. Again, Lowe's showed me how. (Lowe's in Willow Grove, PA.) I look forward to my next trimming job.

    7/19/2014 12:56:32 AM

    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

    © Copyright 2015, Black & Decker Inc. All rights reserved. "BLACK & DECKER","BLACK+DECKER", and the BLACK & DECKER and BLACK+DECKER logos and product names are either registered trade marks or trade marks of "The Black & Decker Corporation"

    Forgot Password?