Features Self-locking structure: impact air screwdriver with self-locking chuck structure, high-precision manufacturing, the bit is not easy to fall off. Damping and low noise: pneumatic screwdriver made of excellent alloy steel material, durable. The main body is frosted, which can reduce grinding vibration. There is a silencer tube in the air pipe to ensure quieter and quieter operation. Applicable scenario: the impact wrench is suitable for use in many different scenarios, often when working on the assembly line in factories, repairing, installing and removing screws, etc. Non-slip spindle: drive air impact wrench with high precision concentric spindle, concentric force, screws do not slip or wobble. Compact and lightweight: the air screwdriver has a compact design, fits comfortably in the hand, is small and lightweight, and triggers the installation of safety devices to prevent a sudden start. Specification: Item Type: Pneumatic Screwdriver Material: alloy steel. Chuck approx. 4 ~ 6 mm / 0.16 ~ 0.24 inches. Idle speed: 12,000 rpm Air pressure: 90 psi Torsion: 40-60 N/M. Air inlet: 1/4 inch Package list: 1 x air screwdriver. 1 x control valve. 1 x intake joint. 1 x Screwdriver Bit 1 x hanging ring. 1 x thumb lock Package List 1 x Air Screw Driver 1 x Regulating Valve 1 x Intake Joint 1 x Screw Driver Bit 1 x Hanging Ring 1 x Thumb Lock