OEM available
Can be used for tennis and badminton

1. Line up the racquet butt against one of the reference marks corresponding to your racquet length.
2. Rotate the knob left or right until the racquet is balanced
3. If the butt of the qacquet is to the right of the reference mark, the racquet is head heavy
4. If the butt of the qacquet is to the left of the reference mark. The racquet is racquet is head light.
5. The final position of the butt corresponds the racquet