Recently bought one of these for the shop. Adjustable torque wrench, very little noise, no rattling vibration, totally adjustable.
Basically a small high speed air motor coupled to a geared reduction unit which multiplies the torque a go-zillion times (from 2500 rpm down to 4 rpm)
Lots safer than multipliers or hydraulic torque wrenches. Not cheep.
JGUN-A3-Z
TORQUE RANGE: 685 to 3083 FT/ LBS
Drive: 1” SQ
HEIGHT: 9.52” (24.2 CM)
http://hytorc.com/