ension puller has a non touch pulling system that allows the tension to be pulled without pushing any buttons. Pulling the string to the side will make the machine pull to the desired tension. This machine also has a optional automatic setting where the racquet head is automatically turned 180 degrees after the tension is released ready to pull string in the next direction.
The new design machine use the new clamp which is made of stainless steel and special steel, it is legerity and convenient.
The new deisgn and function get some many patent certificates.