The Milwaukee 3403-20 M12 FUEL 1/2″ Drill/Driver is a compact cordless drill designed for professional tradespeople and serious DIY users who need strong drilling and fastening performance in tight spaces. Built on the Milwaukee M12 platform, this subcompact drill combines a lightweight design with high torque and fast drilling speeds, making it suitable for installation work, maintenance tasks, and general construction.
Powered by a MILWAUKEE POWERSTATE™ brushless motor, the drill delivers 400 in-lbs of torque and speeds up to 1,550 RPM, providing the power needed for drilling wood, light steel, and driving a wide range of fasteners. The compact 5.9″ overall length allows users to reach tight corners, cabinets, and framing cavities where larger drills may not fit. At only 2.5 lbs with a battery installed, the tool is light enough for all-day use while remaining capable of demanding jobsite tasks.
The drill features REDLINK PLUS™ Intelligence, which manages temperature and power output to maintain performance while protecting the tool from overload. An all-metal 1/2″ ratcheting chuck and all-metal gearcase provide durability for jobsite environments, while the 12-position mechanical clutch delivers consistent torque when driving fasteners. As part of the Milwaukee M12 system, the 3403-20 is compatible with over 125 M12 batteries and tools, making it a practical addition to existing cordless tool setups.
Milwaukee M12 FUEL 12 Volt Lithium-Ion Brushless 1/2″ Drill/Driver At a Glance
- POWERSTATE™ Brushless Motor: Provides strong drilling and fastening performance in a compact drill.
- 400 in-lbs of Torque: Handles wood drilling, light steel drilling, and fastener driving tasks.
- Compact 5.9″ Length: Fits into cabinets, framing cavities, and other tight work areas.
- Lightweight Design: Weighs only 2.5 lbs with battery for reduced fatigue during extended use.
- All-Metal 1/2″ Ratcheting Chuck: Ensures secure bit retention and long service life.
- REDLINK PLUS™ Intelligence: Protects the tool from overload and maintains performance under load.
- Two Speed Transmission: Provides controlled drilling and fastening up to 1,550 RPM.
- Integrated LED Work Light: Improves visibility when working in low-light areas.
Markets
- Construction and Renovation Used for drilling holes and driving fasteners during framing, cabinet installation, and general construction work.
- Electrical Contractors Ideal for drilling small holes for wire routing, mounting electrical boxes, and installing fixtures.
- HVAC Technicians Useful for installing duct supports, brackets, and equipment in confined mechanical spaces.
- Maintenance and Facility Repair Supports everyday drilling and fastening tasks in commercial buildings, schools, and municipal facilities.
- Automotive and Equipment Repair Works well for interior panels, light mechanical work, and accessory installation.
- Trade Schools and Technical Programs Provides students with a compact cordless drill that demonstrates brushless motor technology and professional tool design.
Professionals working in construction and mechanical trades benefit from a drill that balances compact size with reliable torque output. The Milwaukee 3403-20 fits easily on a tool belt and can be used in areas where larger cordless drills are difficult to maneuver. Installers working inside cabinets, between studs, or inside mechanical rooms will appreciate the short overall length and lightweight design.
Maintenance teams and technicians also benefit from the drill’s consistent clutch performance and durable metal components, which allow repeated fastener driving without slipping or damaging hardware. When paired with Milwaukee M12 REDLITHIUM batteries, the tool provides dependable runtime for service calls, repair work, and installation tasks across multiple job sites.
Milwaukee 3403-20 M12 FUEL 12 Volt Lithium-Ion Brushless Cordless 1/2 in. Drill/Driver, Tool Only Features
- POWERSTATE Brushless Motor delivers the power to complete the widest range of applications of any subcompact drill driver
- Only 5.9″ in length for the most access in tight spaces
- Fastest Drilling and Driving applications under load
- Light Weight at 2.5 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
- Compatible with all M12 batteries & chargers
Milwaukee 3403-20 M12 FUEL 12 Volt Lithium-Ion Brushless Cordless 1/2 in. Drill/Driver, Tool Only Includes
- (1) M12 FUEL 1/2″ Drill/Driver (3403-20)
- (1) Belt Clip
Milwaukee 3403-20 M12 FUEL 12 Volt Lithium-Ion Brushless Cordless 1/2 in. Drill/Driver, Tool Only Specifications
- MFG Part #: 3403-20
- GTIN: 00045242637287
- Power Source: Cordless
- Battery Platform: M12™
- Battery Type: Lithium-Ion
- Maximum Torque: 400 in-lbs
- Maximum Speed: 1,550 RPM Speed Settings: (2)
- Chuck Size: 1/2″
- Chuck Type: All-Metal Ratcheting Keyless Chuck
- Clutch Settings: (12)
- Tool Length: 5.9″
- Weight (without battery): 2.1 lbs
- Weight (with battery): 2.5 lbs
- Integrated Work Light: Yes
- Reverse Function: Yes
- Overload Protection: Yes
- Certification: CSA Certified, UL Listed
- Package Height: 8.07″
- Package Width: 6.93″
- Package Depth: 4.17″
- Package Weight: 2.46 lbs
Milwaukee 3403-20 M12 FUEL 12 Volt Lithium-Ion Brushless Cordless 1/2 in. Drill/Driver, Tool Only Warranty
- Milwaukee’s 5 Year Limited Warranty
Why Customers Choose the Milwaukee M12 FUEL 12 Volt Lithium-Ion Brushless 1/2″ Drill/Driver
Contractors and service technicians choose the Milwaukee M12 FUEL 1/2″ drill/driver because it delivers strong drilling and fastening performance in a compact cordless tool. The POWERSTATE brushless motor and 400 in-lbs of torque allow users to drill wood and drive fasteners quickly while keeping the tool small enough for cabinets, mechanical rooms, and interior framing work. For electricians, HVAC technicians, and installers, the short 5.9-inch length provides better access where larger cordless drills cannot fit.
The drill also integrates easily into the Milwaukee M12 cordless platform, allowing crews to use the same batteries across inspection tools, lighting, and installation equipment. With an all-metal chuck, durable gearcase, and REDLINK PLUS electronics, the drill is designed to hold up to repeated daily use. For technicians who need a lightweight cordless drill that still delivers professional drilling speed and torque, the 3403-20 is a reliable choice for service vehicles, tool bags, and jobsite work.
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