The air is a pneumatic tool, because it works such as the noise is relatively large, hence the name, also known as pneumatic wrench. The power source which is air compressor output of compressed air, after the compressed air into the cylinder to drive the air inside the impeller rotation and rotation power. The impeller drives against parts connected to a similar hammering motion, after each keystroke, tighten the screws or unloaded. It is a kind of high efficient, safe and disassembling screw tool. Large air it produces the force equivalent to two adults with a wrench two meters long tried to tighten the screws of the more powerful, its strength is usually with air compressor pressure is proportional to the pressure force, large, otherwise small. So once the pressure is too large, easy to damage when tightening the screw screw.

Eycom pneumatic tube, pressure big, soft, rolling resistance, using a pressure of 40 kg, blasting pressure reached 140 kg, light, is the ordinary rubber hose steel wire of 1/3, the use of 10 years will not crack ageing.