Milwaukee 3404-20 M12 FUEL 1/2” Hammer Drill/Driver – Tool Only

Milwaukee’s 3404-20 M12 FUEL™ 1/2″ Hammer Drill packs high-speed drilling performance into a short 6.0″ body for tight access and all-day portability. The POWERSTATE™ brushless motor delivers up to 400 in-lbs of torque with the Fastest Speed Under Load in its subcompact class, so installers can drill and drive efficiently in wood, metal, and masonry. A 1/2″ all-metal chuck provides strong grip and bit retention, while the mechanical clutch offers consistent torque control across common fasteners. Weighing as little as 2.2 lb (tool only), it rides comfortably on a belt clip and reduces fatigue for overhead and ladder work.

REDLINK PLUS™ intelligence manages thermal performance and power delivery, helping the tool maintain speed under load and protecting packs from overload. Pair the drill with M12™ REDLITHIUM™ CP2.0 for light carry or XC4.0 for extended runtime. With two mechanical speeds (0–450 / 0–1,550 RPM) and hammer mode on tap, the 3404-20 moves from precision driving to concrete anchors without changing tools. Part of the M12 System (125+ tools), it’s a compact, jobsite-ready solution for drilling, driving, and light hammer drilling.

Milwaukee M12 FUEL 1/2” Hammer Drill / Driver At a Glance

• 6.0″ Head Length: Short body improves access in panels, cabinets, and tight framing.
• Brushless POWERSTATE™ Motor: Up to 400 in-lbs torque with fast drilling under load.
• Hammer, Drill & Drive Modes: Switch between masonry drilling and fastening tasks.
• All-Metal 1/2″ Chuck: Secure grip and long service life with larger shank bits.
• Mechanical Clutch: Consistent torque application to protect fasteners and surfaces.
• REDLINK PLUS™ Electronics: Thermal and overload management for tool & battery.
• Two-Speed Gearbox: 0–450 / 0–1,550 RPM to match bit and material.
• LED Work Light & Belt Clip: Better visibility and easy carry between tasks.

Markets

• Construction & Renovation: General drilling/driving and light hammer drilling for anchors.
• Electrical & Low-Voltage: Hole making in wood/metal studs and fast anchor installs.
• Plumbing & HVAC: Brackets, hangers, Tapcon® anchors, and service fastening.
• MRO & Facility Maintenance: Versatile drill/driver with compact size for occupied spaces.
• Property Management: Quick repairs where portability and low weight matter.
• Trade Schools & Training Centers: Demonstrates subcompact hammer drilling and clutch control.

Technicians and installers benefit from a compact hammer drill that maintains speed when the bit bites. The short 6″ length gets into panels and narrow stud bays, while the two-speed transmission lets users start clean and finish fast. On masonry, the hammer mode drives small anchors without carrying a larger tool. The all-metal chuck holds up to repeated bit swaps, and the mechanical clutch keeps screws from overdriving. With REDLINK PLUS managing heat and power, crews pair CP2.0 packs for light carry on service calls or XC4.0 packs for longer runs—staying on the M12 cordless platform to share batteries across drills, impacts, lights, and inspection tools.

Milwaukee 3404-20 M12 FUEL 1/2” Hammer Drill/Driver – Tool Only Features

• POWERSTATE™ Brushless Motor delivers the power to complete the widest range of applications of any subcompact hammer drill driver
• Only 6.0″ in length for the most access in tight spaces
• Fastest Drilling and Driving applications under load
• Light Weight at 2.6 lbs for tool belt portability and less fatigue in the work day
• 1/2″ All-Metal chuck for maximum durability, grip and bit retention
• Mechanical Clutch for consistency in driving a wide range of fasteners
• Unmatched Performance with the most runtime in class with the M12 REDLITHIUM™ XC4.0 battery pack
• All-Metal Gearcase for ultimate durability
• All-metal belt clip for portability
• 400 in-lbs of torque
• LED light for better visibility in low-light situations
• Part of the M12 System, featuring over 125+ Tools

Milwaukee 3404-20 M12 FUEL 1/2” Hammer Drill/Driver – Tool Only Includes

• (1) M12 FUEL™ 1/2″ Hammer Drill/Driver (3404-20)
• (1) Belt Clip

Milwaukee 3404-20 M12 FUEL 1/2” Hammer Drill/Driver – Tool Only Specifications

• MFG Part # (OEM): 3404-20
• UPC: 045242637300
• Platform: Milwaukee M12 (12V)
• Motor: Brushless (POWERSTATE™)
• Torque: 400 in-lbs
• Speeds: 2 (0–450 / 0–1,550 RPM)
• Modes: Drill / Drive (clutch) / Hammer
• Chuck: 1/2″, keyless, all-metal
• LED Light: Yes
• Tool Length: 6.0 in
• Tool Height: 7.0 in
• Tool Width: 2.25 in
• Weight (Tool-Only): 2.2 lb
• Battery/Charger: Tool only (batteries sold separately)
• Battery Type: Lithium-Ion; compatible with M12 CP2.0 and M12 XC4.0
• Assembled Dimensions (L×W×H): 6.0 in × 2.25 in × 7.0 in
• Packaged Dimensions (L×W×H): 4.06 in × 2.25 in × 7.99 in
• Warranty: 5-Year Limited Warranty

Milwaukee 3404-20 M12 FUEL 1/2” Hammer Drill/Driver – Tool Only Warranty

• Milwaukee’s 5 Year Limited Warranty

Why Professionals Select the Milwaukee M12 FUEL 1/2” Hammer Drill/Driver

Crews choose this M12 hammer drill because it combines subcompact size with real drilling speed and a 1/2″ chuck for larger shank bits. In tight panels and overhead work, the 6″ body and light weight reduce strain, while hammer mode speeds small anchor holes in block and brick. The mechanical clutch helps avoid overdriving screws, and REDLINK PLUS keeps performance consistent under load. Staying on the 12V cordless drill platform means lighter packs, quicker charging, and compatibility with 125+ M12 tools, so installers carry less gear and finish more tasks between trips to the truck.