Battery Capacities --12V MAX Slide Li-ion #Hex Shank --1/4" #No Load Speed: # Low --0 - 1,300 RPM # High --0 - 3,000 RPM #Impacts Per Minute: # High --0 - 3,900 IPM # Low --0 - 1,600 IPM #Maximum Torque --1,200 in. lbs (135 Nm) #Vibration Level --12.5