Key Features
1,500 in-lbs OutputThe POWERSTATE brushless motor gives this impact driver the muscle for lag screws, structural fasteners, and day-to-day fastening without stepping up to a bulkier tool. 5 Inch Compact BodyAt only 5 inches long, the Milwaukee M12 FUEL 1/4 in Hex Impact Driver gets into cabinets, service panels, and framing corners where longer impact drivers start fighting you. Tri-LED VisibilityThree LEDs around the collet throw light where the bit is working, which helps when you are driving screws in dim corners and trying to avoid shadows around the fastener.
Overview
The Milwaukee M12 FUEL 1/4 in Hex Impact Driver, model 3453-20, is a cordless fastening tool built for pros and serious DIY users who need strong driving performance in a small package. This is a cordless impact driver designed for driving screws, structural fasteners, and self-tapping hardware in tight spaces. If you already work on the Milwaukee M12 platform and want a compact driver that still hits hard, this is the one that makes sense.
What matters most here is the balance between size and output. The POWERSTATE brushless motor delivers up to 1,500 inch-pounds of torque, up to 3,600 RPM, and up to 4,000 impacts per minute. On the job, that means faster screw driving, better control when you need to keep moving, and enough speed to handle production fastening without reaching for a larger 18V tool for every task. The 4-Mode Drive Control also matters because it lets you match the tool to the fastener instead of using full power for everything.
The compact body is a big part of the story. At only 5 inches in length, this subcompact impact driver is built for access. That helps when you are working inside cabinets, between studs, above head height, or around mechanicals where space disappears fast. Milwaukee also calls out its lightweight build, with a weight of 1.6 pounds without the battery. That makes it easier to keep on your belt and less tiring during all-day fastening work.
Milwaukee did not stop at raw power. The Tri-LED lighting setup surrounds the bit area rather than just lighting from below like many impact drivers do. In real use, that gives you a clearer view of the screw head and reduces shadows around the work. When you are driving into dark framing bays, electrical boxes, under sinks, or inside utility rooms, better visibility saves time and cuts down on stripped screws and missed starts.
From a usability standpoint, the 1/4 inch hex quick-change collet and single-handed bit insertion are the small details that make a difference over a full day. Bit swaps stay quick, and the all-metal belt clip gives you a practical carry option when you are climbing ladders or moving around a site. REDLINK PLUS intelligence is also built in to help manage heat and tool performance under repeated use, which is important if this driver is going to spend the day sinking fastener after fastener.
This impact driver runs on the Milwaukee M12 battery system and is compatible with all M12 batteries and chargers. That is a strong reason to buy it if you already own other M12 tools. It is also compatible with Milwaukee Accessory Bit Holder 49-16-3697. As sold here, 3453-20 is a bare tool, so it is best for buyers who already have M12 power sources and want to add a compact fastening tool without paying again for batteries or a charger.
Who should buy it? Electricians, cabinet installers, HVAC techs, maintenance crews, service plumbers, remodelers, and punch-list carpenters are the obvious fit. It is also a smart second driver for general contractors who want something lighter for overhead work and tight-access fastening. If your priority is a compact impact driver with real speed, strong torque, and full M12 compatibility, this one checks the right boxes.
Compact Size, Real Jobsite Output
The big selling point of the Milwaukee 3453-20 is simple: it gives you the speed and torque you expect from a pro-grade impact driver without the extra length that gets in the way.
- Only 5 in long for better access in cabinets, corners, and overhead work
- Up to 1,500 in-lbs of torque with up to 3,600 RPM and 4,000 IPM
- 1/4 in hex quick-change collet for fast bit swaps
What’s in the Box
- (1) Milwaukee M12 FUEL 1/4 in Hex Impact Driver, 3453-20
- (1) Belt Clip
Battery and charger are not included.
Key Specifications
| Voltage | 12V |
|---|---|
| Battery System | M12 |
| Motor Type | POWERSTATE Brushless |
| Chuck Type | Hex Quick Change |
| Chuck Size | 1/4 in |
| Torque | 1,500 in-lbs |
| No-Load Speed | 0 to 3,600 RPM |
| Impact Rate | 0 to 4,000 IPM |
| Length | 5 in |
| Weight | 1.6 lbs bare tool |
| Variable Speed | Yes |
| Forward / Reverse | Yes |
| Made In | Mexico |
Compatibility
Battery PlatformCompatible with all Milwaukee M12 batteries and chargers. Bit InterfaceUses standard 1/4 in hex driver bits for fastening applications. Accessory FitCompatible with Milwaukee Accessory Bit Holder 49-16-3697.
Built For
Electrical HVAC Plumbing Remodeling Cabinet Installation Service Work General Contracting Fastening in Tight Spaces
Pro Tip
Use the 4-Mode Drive Control instead of running full speed all day. For self-tapping screws and finish hardware, backing the tool down gives you cleaner starts, less stripped heads, and better control than just hammering everything in Mode 3.
Warranty & Support
5 Year Limited Warranty.
Tool Nut’s Take
Tool Nut’s Take
Milwaukee M12 FUEL 1/4 in Hex Impact Driver punches above its size
This is the kind of compact impact driver that earns a permanent spot on the belt because it is light, fast, and strong enough for real work.
- Who it’s for: Tradespeople and serious DIY users who want a compact cordless fastening tool for daily use, especially if they already run M12 batteries.
- Why it stands out: The mix of 1,500 in-lbs of torque, 5 inch length, Tri-LED lighting, and 4-mode control makes it more than just a small backup driver.
- Worth knowing: This is a bare tool, so plan on buying a battery and charger if you are not already on the Milwaukee M12 platform.
Common Questions
- Is this a brushed or brushless impact driver? It uses a POWERSTATE brushless motor.
- What battery platform does it use? It is part of the Milwaukee M12 system and works with all M12 batteries and chargers.
- What size bits does it accept? It has a 1/4 inch hex quick-change chuck for standard 1/4 inch hex bits.
- Does it support adjustable drive settings? Yes. It has 4-Mode Drive Control, including a dedicated self-tapping screw mode.
- Is ONE-KEY enabled? No. This model is not ONE-KEY enabled.
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