Stanley FATMAX 20V 1/2" Cordless Brushless Impact Wrench - Model SBW910M1K-B1

Features:
~ Brushless motor technology for improved power efficiency and longer runtime
~ Integral battery state of charge indicator for convenient monitoring of battery charge levels
~ Powerful motor providing up to 3,100 ipm and 370 Nm of torque for nut setting & other high torque applications
~ 2-Speed gearbox with speeds of 0-900/0-1,900 ppms
~ 1/2 inch hog ring anvil for easy socket changes
~ Integral LED worklight for improved visibility

Specification:
~ No Load Speed: 2800 rpm
~ Voltage: 20V
~ Impact per minute: 3500 bpm
~ Max torque: 280 Nm