Optical tube binocular(20? inclined)
Eyepiece(wide field) 10X (view field .87″ DIA)
Objective 0.8X~8X (zoom)
Zoom ratio 1:10
Infinity parallel optical system and 20? inclined optical tube reduce fatigue.
Coaxial illumination is optical for deep holes that cannot be observed by ring light.
Aperture diaphragm is optional for large depth for dield and high quality image.

Air Turbine Tools 2590SVR - 1/4" Angle Hand Tool Series (Long Version, Rear Exhaust), 30,000RPM, 35830
Air Turbine Tools 310RDM - 6mm Router Hand Tool Series, 30,000RPM, 33433
Air Turbine Tools 310RSV - 6mm Router Hand Tool Series, 40,000RPM, 33441
Air Turbine Tools 2545SSVF - 6mm Angle Hand Tool Series (Short Version, Front Exhaust), 40,000 RPM, 35549
Air Turbine Tools 2545DM - 6mm Angle Hand Tool Series (Long Version, Front Exhaust), 30,000RPM, 35535
Air Turbine Tools 310RXSV - 6mm Router Hand Tool Series with Brake, 40,000RPM, 43445
Air Turbine Tools 201SV - 1/8" Straight Hand Tool Series with Brake, 40,000 RPM, 32144 
