0.5Hp 4" Industrial Roll Throttle Type Air Angle Grinder.

Specifications:
Disc Size: 4" (102 mm)
Free Speed: 12;000 RPM
Tool Weight: 3.52 lbs (1.6 kgs)
Overal Length: 8-1/2 ins (220 mm)
Recommended Air Pressure: 90 psi (6.3 bar)
Minimun Hose Size: 3/8" in. (10 mm)