Why Choose Maotian 3/8" Pistol Grip Keyed Chuck Air Drill for Workshops 3/8" Pistol Grip Keyed Chuck Air Drill units give workshops a compact pneumatic option for creating holes and driving fasteners in varied materials. Selecting the right model starts with verifying free speed and torque output against the thickness and hardness of the work pieces you handle most often. Typical free speeds fall between 1800 and 2500 RPM while stall torque remains moderate...