Electric sword with purple sword
The difference between electric wrench and the air is driven in different ways. Electric wrench is driven by a motor, and the air by air pneumatic motor drive.
Electric wrench features: electric wrench is motor power, you can smooth output torque, you can do accurate torque, and the damage to the bolt is very small, but when the motor overheating will affect its torque accuracy.
The air (pneumatic wrench) features: is driven by air pneumatic motor, with the impact of work piece, through kept tapping nut / bolt. Therefore, the noise is relatively large, and can not do the effective fixed torsion, but also will have certain harm to the bolt.
