Key Features
Gas-Level PowerThe POWERSTATE brushless motor gives this string trimmer more power than 31cc gas powerheads, so it keeps cutting in thick grass without the noise, fuel, and upkeep of gas equipment. Fast Throttle ResponseFull throttle in under 1 second, plus 3 speed settings and a variable speed trigger, means better control when you are trimming light edges or leaning into heavy overgrowth. QUIK-LOK VersatilityThe Milwaukee 3016-21ST M18 FUEL String Trimmer w/ QUIK-LOK Kit uses a split boom power head that works with all 13 Milwaukee QUIK-LOK attachments, so one power head can cover more jobs.
Overview
The Milwaukee 3016-21ST M18 FUEL String Trimmer w/ QUIK-LOK Kit is a cordless split-boom string trimmer kit built for landscape maintenance professionals and property owners who want gas-style cutting performance without pulling a cord or mixing fuel. This is a string trimmer designed for grass trimming, edging, and general landscape maintenance. Model Number: 3016-21ST. If you need one platform that can handle regular trimming now and expand into other outdoor power equipment jobs later, this kit makes a strong case.
On the job, the big story is power and response. Milwaukee rates the POWERSTATE brushless motor at more power than 31cc gas powerheads, and the tool reaches full throttle in under 1 second. That matters when you move from open trimming into thicker patches along fences, around signposts, or near retaining walls. Instead of waiting for the head to build speed, you squeeze the trigger and get right to work. The 3-speed settings and variable speed trigger also let you back the tool down when you are working around soft turf, decorative edges, or areas where full output is not necessary.
The cutting setup is built for real use, not just spec-sheet bragging. You get an adjustable cutting blade for either a 16 inch or 14 inch cutting swath, so you can choose between more coverage or better runtime and control. The trimmer head accepts 0.080 inch or 0.095 inch line, which gives you flexibility depending on what kind of material you are cutting. For lighter weekly maintenance, you can stay efficient. For thicker growth, heavier line gives the head more authority. Milwaukee also uses its Easy Load trimmer head, which is the kind of feature you appreciate after a long day when restringing needs to be quick and painless.
Milwaukee put real thought into the layout of this cordless string trimmer. The motor sits at the rear, which helps with balance and keeps the tool from feeling nose-heavy during longer trimming sessions. That balanced design is meant to improve control and reduce user fatigue, and that is a big deal on commercial properties, apartment complexes, and municipal work where trimming can go on for hours. The advanced air-cooling system is there for the same reason: keep the tool working hard in demanding applications without falling off as heat builds up.
This kit is more than a standalone trimmer. The power head is part of Milwaukee’s QUIK-LOK attachment system, which means it is compatible with all 13 Milwaukee QUIK-LOK attachments. That gives the tool a lower cost of ownership if you want one power head to handle trimming today and other outdoor tasks later. It is also part of the broader M18 battery platform, so the included REDLITHIUM FORGE XC8.0 battery works within the M18 system, which Milwaukee lists at over 275 tools. For users already invested in M18, that is a practical advantage, not just a platform talking point.
Milwaukee also backs the electronics with REDLINK PLUS intelligence to protect against overload, overheating, and over-discharge while maximizing performance. In plain terms, that means the tool is built to keep working hard without cooking itself or the battery when conditions get rough. That matters in hot weather, tall grass, and stop-and-go trimming where a lesser cordless trimmer can start to feel inconsistent.
Who should buy it? This kit makes the most sense for professional landscapers, grounds crews, maintenance teams, and serious homeowners who want one of the more capable cordless outdoor power setups on the M18 platform. If you just need a light-duty trimmer for occasional touch-ups, this is more machine than you need. But if you want strong trimming performance, attachment-system flexibility, and a complete kit with battery and charger included, this one is built for that kind of work.
Built to Trim Fast and Reload Faster
This kit gives you the complete cordless setup from day one, with the power head, trimmer attachment, battery, and charger in one box. It is built for users who want pro-level trimming performance without piecing the system together separately.
- Easy Load trimmer head can load up to 25 feet of trimmer line in under 30 seconds
- Adjustable 14 inch or 16 inch cutting swath lets you choose runtime and control or wider coverage
What’s in the Box
- (1) M18 FUEL Power Head w/ QUIK-LOK (3016-20)
- (1) M18 FUEL QUIK-LOK String Trimmer Attachment (49-16-2717)
- (1) M18 REDLITHIUM FORGE XC8.0 Battery Pack (48-11-1881)
- (1) M18 & M12 Rapid Charger (48-59-1808)
Key Specifications
| Battery Platform | M18 |
|---|---|
| Maximum Horsepower | 1.63 HP |
| Weight | 12.3 lbs |
| Cutting Swath | 14 in / 16 in |
| Maximum Line Diameter | 0.095 in |
| Compatible Line Diameter | 0.080 in / 0.095 in |
| Maximum Speed | 6,200 RPM |
| Motor Type | POWERSTATE Brushless |
| Head Style | Easy Load |
| Shaft Style | Straight |
| Length | 69.5 in |
| Made In | Mexico |
Compatibility
Battery Platform Runs on the Milwaukee M18 battery system and includes an M18 REDLITHIUM FORGE XC8.0 battery pack. Charger Includes an M18 and M12 Rapid Charger for charging across both Milwaukee battery platforms. QUIK-LOK Attachment System The power head is compatible with all 13 Milwaukee QUIK-LOK attachments, letting one power head handle multiple outdoor applications.
Built For
Landscape MaintenanceProfessional LandscapingGrounds CrewsProperty MaintenanceGrass TrimmingEdgingCommercial Outdoor WorkM18 Platform Users
Pro Tip
Use the 14 inch swath when you want better runtime and tighter control around fences, beds, and posts. Open it up to 16 inches when you are clearing larger areas and want to cover ground faster.
Warranty & Support
3 Years warranty on the tool and 3 Years warranty on the battery.
Tool Nut’s Take
Tool Nut’s Take
Milwaukee 3016-21ST M18 FUEL String Trimmer w/ QUIK-LOK Kit is the smart buy for crews that want power without gas headaches
This is the kind of cordless string trimmer kit that makes sense when you want pro-grade trimming performance and a power head that can do more than one job.
- Who it’s for: Landscapers, maintenance crews, and serious homeowners who want a cordless trimmer that can hold up to frequent use and plug into a bigger outdoor tool system.
- Why it stands out: You get strong cutting power, under-1-second throttle response, adjustable 14 inch or 16 inch swath, and access to all 13 QUIK-LOK attachments from one power head.
- Worth knowing: At 12.3 pounds, this is built more like a professional outdoor power tool than a light-duty homeowner trimmer, which is a good thing if you need performance but more tool than necessary for tiny weekly touch-ups.
Common Questions
- Is this a bare tool or a complete kit? It is a complete kit with the power head, string trimmer attachment, M18 REDLITHIUM FORGE XC8.0 battery, and M18/M12 Rapid Charger.
- What battery system does it use? This tool runs on Milwaukee’s M18 battery system.
- Can it use other QUIK-LOK attachments? Yes. The power head is compatible with all 13 Milwaukee QUIK-LOK attachments.
- What trimmer line size does it support? The trimmer supports 0.080 inch and 0.095 inch line, with a maximum line diameter of 0.095 inch.
- Can you change the cutting width? Yes. The cutting swath can be set to 14 inches or 16 inches depending on the balance of coverage, control, and runtime you want.
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