This machine is designed to determine the twisting strength of badminton and tennis rackets so that manufactures can improve their quality. Two supports of the machineare used for fixing the head of the racket frame. Weights are hung on the end of the racket handle to apply torsion so as to observe the damage and determine if it is accepted.

　　Weights available for different rackets such that you can change the torsionapplied to the racket being tested. Twisting angle can be read from the indicating dial. The clamping length of the racket is adjustable.