18V STANLEY® FATMAX® V20 Impact Wrench - Bare Unit (SFMCF900B)

Features & Benefits

  • With improved battery technology, no memory effect and minimal self-discharge, the V20 lithium ion battery pack is ready to go to work whenever you are and wherever the job takes you - and it will last longer too
  • Powerful motor providing up to 1700 RPM and 450Nm of torque for driving larger fasteners and other high torque applications
  • Variable speed to control the fastener you're driving
  • 1/2" ring for ease of socket change
  • Integral LED worklight for improved visibility in all working conditions
  • 18V STANLEY® FATMAX® V20 Cordless System - power all your V20 tools with a common new & improved 18B lithium ion battery to let you power through work with ease
3 year warranty

Register your STANLEY Fatmax Powertool to claim your 3 year warranty*


* Terms & conditions apply. Registration required within 4 weeks of purchase.

  • Specifications
  • Standard Equipment
  • Applications
Impact Rate (bpm)2,500
Voltage (V)18
No Load Speed (rpm)0-1,700
Max. Torque (Nm)475
STANLEY® FATMAX® V20 18V Impact Wrench
Fitting and removal of large, high torque fasteners.

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18V STANLEY® FATMAX® V20 Impact Wrench - Bare Unit (SFMCF900B) reviews verified by reevooReevoo

4 reviews

Reviews from:Sort by:
Ease of use
Value for money
Design and Ergonomics
Overall rating
Scores 9.3 out of 10 based on 4 reviews
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10 out of 10


Inverloch Victoria AU DIY-user
User’s my battery’s form my other Stanley fat max tools
An adapter to go from 18v to 20 v for old batteries , I have the adapter to go from 20v to 18v
Confirmed purchase: 10 August 2021
Published on: 24 August 2021
10 out of 10


Mount Gambier AU Automotive
massive amount of torque to remove fasteners.
No. All good
Review photo icon

5/8 UNC fasteners- no problem

Confirmed purchase: 21 December 2020
Published on: 06 January 2021
9 out of 10


Rainbow Beach AU Automotive
It’s relatively light weight but has plenty of grunt and the 4 AH battery has extremely long charge life.
Reviewer left no comment
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Confirmed purchase: 12 August 2020
Published on: 03 September 2020