Black+Decker 14-Inch String Trimmer Review: Pros, Cons, Who It Is For
The BLACK+DECKER BESTA510 is a 6.5-amp corded electric trimmer with a 14 in cut path, auto feed spool and a head that rotates into a wheeled edger.
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On a suburban lot with fenced flower beds, a sidewalk out front and the strip of grass along the driveway, the mower finishes most of the work but leaves ragged edges and the corners it cannot reach. That leftover trimming is the job for a string trimmer, and this black+decker 14-inch string trimmer review looks at one corded electric model that promises to trim and edge in a single tool. We have not used it: every figure below comes from BLACK+DECKER’s Amazon listing for the BESTA510, and where the listing does not state something, we say so.
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This is a research-based review. Every figure below comes from BLACK+DECKER’s Amazon listing for the BESTA510 string trimmer, collected 18 October 2026. We compared what the listing states against what it leaves out, and scored it the same way we score every trimmer on this site.
BLACK+DECKER Weed Wacker 14-Inch 2 in 1 String Trimmer Edger, 6.5-Amp Electric (BESTA510)
A 6.5-amp corded electric string trimmer with a 14 in cutting width, automatic feed spool and a rotating head that converts it to a wheeled edger.
Read the full review
The BESTA510 is BLACK+DECKER's corded answer to the trimmer-and-edger question: one 6.5-amp electric tool with a 14 in cutting width, an automatic feed spool that needs no bumping, and a head that rotates into a wheeled edger. We have not used it, so this review reports what the listing states. The headline features are consistent across the title, bullets and spec table, and the included AF-100 spool gives refills a clear part number.
What the listing states best: light weight at 6.3 pounds, adjustable handle and height positions, a cord retention system and concrete warranty terms of a 2 Year Limited Warranty plus a 30 Day Money Back Guarantee. What it leaves open: line diameter, cord length, shaft range, materials and noise. The maker's claim that the motor and POWERDRIVE transmission give maximum performance in tough weeds and overgrowth is reported as a claim, not a measured result.
Scored on stated specs, the BESTA510 reads as a straightforward corded trimmer-edger for suburban edges: the auto feed and 2-in-1 conversion are real conveniences, while the cord and the unstated line diameter set its limits. Buyers far from an outlet or facing heavy brush should look at battery or gas options instead.
Pros
- Automatic feed spool advances line without bumping the head.
- Rotates into a wheeled edger with an edge guide for straight borders.
- Light at 6.3 pounds with adjustable handle and height positions.
- Cord retention system keeps the extension cord connected during use.
Cons
- Corded design limits range to the reach of an extension cord; no cord length is stated.
- Line diameter is not stated, so cutting capability on thick growth cannot be judged.
- Only one speed is stated (8000 rpm); no variable-speed control is listed.
- No noise rating is stated.
Other machines to compare
Husqvarna 122C String Trimmer with Tap N' Go Trimmer HeadCheck price on Amazon
BLACK+DECKER Electric Hedge TrimmerCheck price on Amazon
Husqvarna 130L Gas String TrimmerCheck price on Amazon
BLACK+DECKER 22" Electric Hedge TrimmerCheck price on Amazon
095 Trimmer LineCheck price on Amazon
Hipa 3-Pound .095" Heavy-Duty Professional Round Trimmer LineCheck price on Amazon
black+decker 14-inch string trimmer review: specs at a glance
| Spec | BLACK+DECKER BESTA510 |
|---|---|
| Model | BESTA510 |
| Power source | Corded electric |
| Motor | 6.5 amp with POWERDRIVE transmission |
| Cutting width | 14 inches |
| Speed | 8000 rpm |
| Line feed | Automatic feed spool (AF-100) |
| Function | 2 in 1, rotates to wheeled edger |
| Weight | 6.3 pounds |
| Handle | Adjustable handle and height positions |
| Cord | Cord retention system, length not stated |
| Included | Trimmer, AF-100 spool, auxiliary handle, guard |
| Warranty | 2 Year Limited Warranty, 30 Day Money Back Guarantee |
Two numbers define what this tool is for. The 14 in cutting width clears a fence line in fewer passes than a narrower head while staying easy to steer between beds. The 6.5 amp motor with the POWERDRIVE transmission is the maker’s stated drive system, which the listing claims gives maximum performance in tough weeds, grass and overgrowth. That last part is a marketing claim, so read it as what the maker promises, not a measured result. At 6.3 pounds with an adjustable handle and height positions, the listing describes a light tool that fits different users, and the cord retention system keeps the extension cord from pulling free mid-cut.
Who the BESTA510 is for
- Owners of small to mid-size suburban lots who edge along sidewalks, driveways and flower beds and trim where the mower cannot reach.
- Anyone tired of bumping a trimmer head: the automatic feed spool feeds line on its own, so there is no bump-to-advance step.
- Shoppers who want trimmer and edger in one tool: rotating the head converts it to a wheeled edger with an edge guide.
- Users who prefer corded electric: no battery to charge, no fuel to mix, full power as long as the outlet is in reach.
The pick
There is one product in this review, scored below on stated specs. The card names what the listing states, where it is strong and where the listing leaves questions open.
What the trimmer does well
Automatic line feed
The listing’s headline feature is the automatic feed spool, which advances line without bumping the head on the ground. On paper this removes the most annoying step of string trimming: stopping to tap the head when the line wears short. The included AF-100 spool is the replacement part named in the listing, so refills have a clear part number.
Trimmer becomes an edger
A single rotation converts the tool from trimmer to wheeled edger, and the wheeled edge guide rolls along the border for a straight cut. The listing positions it for edging along borders, sidewalks and flower beds, which is the second job most suburban owners ask a trimmer to do after cutting grass the mower missed.
Light and adjustable
The maker lists 6.3 pounds with adjustable handle and height positions. Light weight matters on a tool you swing along a fence line, and adjustable positions mean more than one household member can use it in comfort. The auxiliary handle is included in the box.
Stated warranty terms
The listing states a 2 Year Limited Warranty and a 30 Day Money Back Guarantee, and the spec table repeats both. Because the terms are concrete, the trimmer earns warranty points in our Acre Score.
Limitations to know before you buy
Corded range is the ceiling
This is a corded electric tool, so its working range ends where the extension cord ends. The listing does not state a cord length, and the 6.3-pound weight does not include whatever extension cord you add. Plan the route from the outlet before you start; for ground far from any outlet, a battery trimmer fits better.
Line diameter is not stated
The listing names the AF-100 spool and the automatic feed but gives no line diameter. Diameter is what decides how the line handles thick weeds versus light grass, so without it we cannot judge cutting aggression from the specs. Our trimmer string size chart explains what diameters suit which growth.
One stated speed
The spec table lists 8000 rpm with no variable-speed control mentioned. A single speed keeps the tool simple, but there is no low-speed setting for delicate work around young plantings and no high-speed setting for heavy growth. What the listing states is one speed for everything.
No noise rating
The listing gives no decibel figure, so buyers who trim early near neighbors cannot judge loudness from the page. That is a gap worth knowing before you choose a tool for weekend-morning work.
What the listing leaves out
We read the title, bullets and spec table against each other and found no direct contradictions: the 2-in-1 trimmer-edger claim, the automatic feed spool, the 6.5-amp motor and the 14 in cutting width appear consistently. The gaps are what the listing never says: line diameter, spool line type, extension cord length, shaft length range, materials and a noise rating. Each one is a question the buyer cannot answer from the page.
Who should skip it
- Owners whose trimming happens far from any outlet, such as fence lines on multi-acre lots; a battery or gas trimmer covers that ground.
- Anyone who needs a stated line diameter or a variable-speed control to match heavy growth; this listing states neither.
- Buyers who want a published noise rating before choosing a tool for early-morning work.
- Shoppers who need the shaft length range or the materials to judge fit and durability; the listing does not state them.
Alternatives
If edging is the main job rather than trimming, our best rated electric lawn edgers compare dedicated edgers. For cord-free trimming, see the best cordless lawn edgers. And if you are unsure which line your trimmer takes, the trimmer string size chart lays out diameters by task.
Lawn size, deck width and speed in; minutes per mow out. Or work backward from the time you want to spend.
Wear eye and hearing protection, long pants and sturdy footwear, and keep bystanders well back while the line or blade spins. Clear stones and debris first, and stop the engine or remove the battery before clearing the head. Refuel only with the engine off and cool. See OSHA landscaping safety. Read our Safety Disclaimer.
Matching It to Your Property
- Small suburban lots: the 14 in cutting width and corded power suit edges around beds, walks and driveways close to the house.
- Obstacles and tight spots: the 6.3-pound weight and adjustable handle help around fence posts and plantings where the mower cannot go.
- Storage: corded electric means no battery or fuel to manage between seasons.
- Edges that need a straight line: the wheeled edge guide suits long sidewalk and driveway borders.
FAQ: mowing large lots
Is the BLACK+DECKER BESTA510 corded or battery powered?
Corded electric. The listing states corded electric power with a cord retention system, so it runs from an outlet through an extension cord and has no battery to charge.
What is the cutting width?
14 inches, as stated in the spec table. That is the width of the swath the line cuts in one pass.
Does it work as an edger?
Yes, as a 2-in-1. The listing says rotating the head converts the trimmer into a wheeled edger, and a wheeled edge guide is built in for straight cuts along borders, sidewalks and flower beds.
How does the automatic feed spool work?
The listing states the automatic feed spool advances line without bumping the head, which removes the tap-to-feed step. The replacement spool named in the listing is the AF-100.
What warranty does the listing state?
A 2 Year Limited Warranty stated in the bullets, plus a 30 Day Money Back Guarantee stated in the spec table’s warranty description.
