ASBE 647-1
3/4 in. square drive electronic speed control impact wrench
with tightening and slackening torque up to 18 ft.lbs.
One-hand operation.
Max. torque approx. 87 to 181 ft.lbs.
ASBE 648
3/4 in. square drive electronic variable speed impact
wrench with tightening and reversing torque up to 400
Nm.
Max. torque approx. 174 to 289 ft.lbs.
ASB 658-1
Fein's most powerful 1 in. square drive impact wrench
with highest tightening and reversing torque.
Max. torque approx.
506 ft.lbs.
FEIN Tools 
400
Watt
1050-1450/min
3/4
Inch
8.4
lbs.