SR375 3/8" square drive, 10mm bolt capacity.
Noise Level: 89dBA
Sound Power: 96dBA
Vibration: 4.0m/s

SR500 1/2" square drive, 13mm bolt capacity.
Noise Level: 89dBA
Sound Power: 89dBA
Vibration: 4.0m/s

Both:
Ball type retainer, disc type reversing action, compact, lightweight design, ideal for automotive work, front exhaust.
Free speed: 150rpm.
Air inlet thread: 1/4" NPT.
Minimum air hose size (ID): 10mm (3/8").
Air pressure: 6.2bar/90psi.
Air consumption: 4cfm* (113ltr/m).
Torque: 50ft/lbs.
Overall length: 255mm.

*Based on a 15 second cycle per minute average use.