900
New Product · 18V Brushless
DW–405
Cordless Brushless Impact Wrench
30 to 900 Nm – delicate to brutal, one tool.
Set your torque. Stop guessing when to ease off.
No broken bolts. No dropped nuts.
No broken bolts. No dropped nuts.
360° VIEW
900
Nm
breakaway torque
2,800
RPM
top speed
1.2
KG
bare tool
134
MM
short body
Performance
Backed by your skill.
Built to hold the standard.
DW-405’s Torque-Limit Mode turns the torque requirement in your manual or work order into a setting directly on the tool. It helps operators follow the same standard, maintain consistency across shifts, and reduce over-fastening, rework, and downtime.
Standard Execution
From Spec to Setting
Your documented torque figure becomes a setting on the panel, so operators follow the spec, not their own feel.
Direct Control
Control at Your Fingertips
Your required torque limit is one button away, no phone, app, or pairing needed.
Process Control
Consistency That Lasts
You set the limit. Torque-Limit Mode helps keep every operator and shift aligned.
Rework Prevention
Protection Before It Costs You
Your torque limit helps prevent the over-fastening that leads to component failure, costly rework, or downtime.
M7’s First Torque Control
Set the torque.
Lose the guesswork.
T
Torque Control
Press T to select: 30, 50, 75 or 100 Nm.
M
Mode Select
Forward – sets the torque limit: 30-100 Nm.
Reverse – both LEDs on, auto-stops once loose.
Fewer mistakes.
Faster work.
Faster work.
Cuts over-tightening and loose-nut drop risk.
Specifications
The numbers.
Square Drive
1/2″ / 12.7 mm
Max Torque
660 ft-lb / 900 Nm
No Load Speed
1,200 / 1,750 / 2,300 / 2,800 RPM
Rating Voltage
18 V
Completely Charged
20 V
Torque Levels
30 / 50 / 75 / 100 Nm
Bolt Capacity
M6-M16
Overall Length
134 mm
Net Weight
1.2 kg (2.42 lbs)
Get In Touch
Request
a quote.
Two business days. Real answers.
Smart torque-limit control
Reverse auto-stop mode
Born in Taiwan quality
FAQ
Common Questions.
What is the DW-405 best used for?
The DW-405 is a cordless brushless impact wrench for fastening and removing M6-M16 bolts. Selectable Torque Control (30/50/75/100 Nm) and a Reverse Auto-Stop mode suit repeatable bolt-and-nut work where torque needs to stay consistent.
Who typically uses the DW-405?
It suits technicians and operators who fasten or loosen bolts throughout the day and need predictable torque instead of judging by feel. Its compact 134 mm body and 1.2 kg weight are built for one-handed, all-day use.
How is the DW-405 different from a standard impact wrench?
A standard impact wrench delivers full impact force until the trigger is released, which can over-tighten or strip smaller fasteners. The DW-405 adds an onboard Torque Control panel that limits output to a set Nm value, so the tool stops within range instead of relying on operator timing.
What does the torque control / limited torque function do?
Pressing the T button selects one of four torque levels: 30, 50, 75 or 100 Nm for the fastening direction. This lets the same tool run lighter for small fasteners or higher for larger ones, reducing over-tightening.
What does Reverse Auto-Stop do?
In reverse, pressing M activates Auto-Stop mode (both LEDs on), which stops the tool automatically once a fastener has been loosened, instead of continuing to spin after the nut is off.
Is the DW-405 suitable for automotive, tire or maintenance work?
Its 1/2″ square drive and M6-M16 bolt capacity match typical automotive, tire and maintenance fastening tasks, and the Torque Control levels help protect the smaller fasteners common in that work.
How can I ask about pricing or purchasing the DW-405?
Use the Request a Quote form on this page with your company and market details. The M7 team replies within two business days.
Product Facts
Product name: DW-405
Brand: M7 (Mighty Seven)
Product type: Cordless Brushless Impact Wrench
Best use: Fastening and loosening M6-M16 bolts with selectable torque control
Key features: 900 Nm max torque, Torque Control (30/50/75/100 Nm), Reverse Auto-Stop, 2,800 RPM top speed, 1.2 kg
Main users: Technicians and operators doing repeated bolt fastening and removal
Main applications: Automotive, tire and maintenance fastening tasks
DW-405 · Cordless Brushless Impact Wrench | Born in Taiwan