Features: 1.The frame of the machine is made of high quality steel,special surface treatment,beautiful appearance. 2.It come with a 10 Wrap coils,the coils are made of copper. 3.You can adjust the voltage from 6~10 to fit for liner or shader. 4.Lightweight and low vibrations,can work a long time without hand-tired. 5.Unwarming for long time using. 6.Fit for Standard grips and needles.