Milwaukee 3676-20 M18 FUEL 4 1/2″-6″ Dual Trigger Braking Grinder, Paddle Switch w/ ONE KEY – Tool Only

The Milwaukee 3676-20 M18 FUEL™ 4-1/2″ / 6″ Dual-Trigger Braking Grinder is built for higher-risk cutting and grinding where control and stopping time matter as much as power. A POWERSTATE™ brushless motor sustains 9,000 RPM and delivers 13A corded power for demanding cuts on steel, stainless, and masonry (with rated accessories). The dual-trigger paddle requires two-hand activation, reducing accidental starts and improving control during awkward cuts or overhead work. A permanent side handle with 15 clockable positions helps users set a stable stance around odd geometries, while AUTOSTOP™ kickback control and an electronic clutch add layers of protection when a wheel binds.

A 4-mode variable speed range (3,000–9,000 RPM) matches the tool to flap discs, wire wheels, and thin-kerf cut-offs. RAPIDSTOP™ braking brings most abrasive wheels to a stop in under 2 seconds, helping users set the grinder down quickly between operations. REDLINK PLUS™ manages thermals and load, and ONE-KEY™ adds tracking, management, and security across fleets. As a Tool-Only model, it runs on any M18™ battery—pair with REDLITHIUM™ HIGH OUTPUT™ or FORGE™ packs for best sustained performance.

Milwaukee M18 FUEL 4 1/2″-6″ Dual Trigger Braking Grinder, Paddle Switch w/ ONE KEY At a Glance

• Two-Hand Activation: Dual-trigger paddle requires both hands, adding control on tough cuts.
• 15-Position Side Handle: Permanent handle clocks around the head for better leverage and access.
• AUTOSTOP™ Kickback Control: Helps prevent severe kickback during binds; electronic clutch adds protection.
• RAPIDSTOP™ Brake: Stops most accessories in < 2 s for safer handling.
• Variable Speed (4 Modes): 3,000–9,000 RPM for materials from thin sheet to heavy stock.
• 13A Corded Power: Brushless motor maintains 9,000 RPM under load for fast cutting and grinding.
• Tool-Free Guards: Quick change between Type 27 (grinding) and Type 1 (cutting) guards.
• ONE-KEY™ Enabled: Track, manage, and lock out the tool across jobsites

Markets

• Metal Fabrication & Welding Clean bevels, weld prep, and post-weld grinding with better control on binds.
• Commercial Electrical & Mechanical Cutting strut, bolts, and tray with two-hand activation for safer handling.
• Industrial & Facility Maintenance Field repairs where corded grinders are impractical.
• Construction & Demolition Rebar, plate, and masonry cuts (with rated accessories and dust control).
• Municipal & Utilities Work around the public where RAPIDSTOP and dual-trigger controls are preferred.
• Trade Schools & Safety-Focused Programs Teaching two-hand grinder techniques and kickback mitigation.

Shops and field crews that push grinders hard want corded performance with more control. The 3676-20 delivers 13A-class output and variable speed for cleaner finishes on stainless and carbon steel, while the dual-trigger makes two-hand operation standard practice. AUTOSTOP and the electronic clutch help mitigate kickback when wheels pinch, and RAPIDSTOP shortens downtime between cuts. The 15-position handle lets users dial in leverage on channel, angle, or pipe without compromising stance. With ONE-KEY, supervisors can locate tools, assign them to jobs, and lock them out if they go missing. Running on the M18™ platform, crews get consistent runtime and simplified battery logistics.

Milwaukee 3676-20 M18 FUEL 4 1/2″-6″ Dual Trigger Braking Grinder, Paddle Switch w/ ONE KEY – Tool Only Features

• Dual-Trigger ensures two handed operation
• Permanent side handle provides 15 positions for greater control
• AUTOSTOP™ kickback control prevents severe kickback
• RAPIDSTOP™ Brake stops most wheels in less than 2 seconds
• Electronic clutch for kickback protection
• Variable speed provides 4 speed settings between 3,000 RPM and 9,000 RPM for greater control
• ONE-KEY™ Compatible: Ability to customize, track and manage tools for increased productivity and investment protection
• POWERSTATE™ Brushless Motor: Purposely built for the M18 FUEL™ 4-1/2″ / 6″ Angle Grinder delivers 9,000 RPM to provide the power to complete the toughest grinding and cutting applications
• REDLINK PLUS™ Intelligence: Most advanced system of electronics in the industry, enabling communication between batteries and tools, allowing for unmatched levels of performance, protection, and compatibility.
• REDLITHIUM™ HIGH OUTPUT™ Battery Pack (Not Included): Provides 50% more power and runs 50% cooler versus standard REDLITHIUM™ Battery
• Overload Protection: Maximizes motor life
• Anti-Vibration Side Handle: Reduces vibration, increasing user comfort during extended use
• Tool free guard provides easy guard adjustment
• 5/8″-11″ Spindle for use with common grinding accessories
• Compatible with all M18™ Batteries

Milwaukee 3676-20 M18 FUEL 4 1/2″-6″ Dual Trigger Braking Grinder, Paddle Switch w/ ONE KEY – Tool Only Includes

• (1) M18 FUEL™ 6″ Dual-Trigger Braking Grinder (3676-20)
• (1) Spanner Wrench (49-96-7215)
• (1) Type 27 Guard (28-41-0034)
• (1) Type 1 Guard (43-54-4020)
• (1) Disc Flange (43-34-3000)
• (1) Flange Nut (44-40-7100)
• Tool Only — battery and charger not included

Milwaukee 3676-20 M18 FUEL 4 1/2″-6″ Dual Trigger Braking Grinder, Paddle Switch w/ ONE KEY – Tool Only Specifications

• MFG Part #: 3676-20
• UPC / GTIN: 045242374809 / 00045242374809
• Battery System: M18™ (Lithium-Ion)
• Motor Type: POWERSTATE™ Brushless
• Compatible Wheel Diameter: 4-1/2″ / 6″
• RPM Range: 3,000–9,000 (4 modes)
• Switch Type: Dual-Trigger Paddle (no lock-on)
• AUTOSTOP™: Yes
• RAPIDSTOP™ Brake: Yes (< 2 s with abrasive wheel)
• Electronic Clutch / Overload Protection: Yes
• Spindle: 5/8″-11
• Length: 15 in
• Weight (Excluding Battery): 6.6 lb (assembled weight listed at 5.5 lb; verify per battery/accessory)
• Assembled Dimensions (L × W × H): 15 × 3 × 5.4 in
• Package Dimensions (H × W × D): 7.72 × 18.54 × 7.32 in
• Package Weight: 8.42 lb
• Certifications: cUL/UL Listed

Milwaukee 3676-20 M18 FUEL 4 1/2″-6″ Dual Trigger Braking Grinder, Paddle Switch w/ ONE KEY – Tool Only Warranty

• Milwaukee’s 5 Year Limited Warranty

Why Professionals Choose the Milwaukee M18 FUEL 4 1/2″-6″ Dual Trigger Braking Grinder, Paddle Switch w/ ONE KEY

Safety-focused crews choose this cordless braking grinder because it adds control without giving up speed. The dual-trigger paddle enforces two-hand operation, while AUTOSTOP and the electronic clutch help reduce kickback risk. Users get variable-speed grinding for stainless, steel, and masonry with accessories rated to 9,000 RPM, and RAPIDSTOP shortens turnaround between cuts. The 15-position handle improves body mechanics on strut, angle, and pipe work. Fleet managers value ONE-KEY tracking and lockout, and teams standardizing on M18™ appreciate shared batteries and chargers across the platform.

Milwaukee 3676-20 M18 FUEL 4 1/2″-6″ Dual Trigger Braking Grinder, Paddle Switch w/ ONE KEY – Tool Only Notes for Buyers (quick tips)

• Two-Hand Discipline: The dual-trigger requires both hands—keep your off-hand on the permanent side handle to maintain control at startup and during binds.
• Guarding 101: Use the Type 27 guard for grinding wheels and the Type 1 guard for cut-off wheels. Never run a Type 1 wheel under a Type 27 guard.
• Accessory Ratings: Confirm wheel diameter and max RPM ≥ 9,000. Match speed mode to the accessory (lower for flap/wire, higher for grinding/cut-off).
• Kickback Response: If AUTOSTOP or the electronic clutch trips, back out and reset your approach—don’t force the cut.
• Mounting Hardware: Use the correct flange and nut orientation for each accessory; ensure the wheel seats flat before tightening.
• Battery Choice: Tool runs on any M18™ pack; for heavy grinding, choose REDLITHIUM™ HIGH OUTPUT™ or FORGE™ batteries for better sustained power.
• Brake Expectations: RAPIDSTOP™ is optimized for abrasive wheels; diamond wheels may coast longer—wait for a full stop before setting down.
• Dust & Sparks: For masonry, use a rated shroud and dust extraction per local regulations. Direct sparks away from glass, wiring, and bystanders.
• Storage & Transport: Remove the battery, install a guard, and avoid resting the tool on the spindle lock button in the bag.