Tension Calibrator, Tennis and Badminton String Tool, Accurately Measures String Tension

¡¾String Tension Calibrator¡¿Spring tension calibrator for checking machine accuracy. ¡¾Tension Measuring Device¡¿Connect between string machines to see the actual tension. ¡¾Premium Material¡¿The tension calibrator is made of aluminum alloy, which is strong and durable. ¡¾High Performance¡¿Badminton racket tension calibrator are stable performance, vibration resistance, and high practicability. ¡¾Application¡¿Applicable to all brand stringing machines, suitable for tennis/ badminton/ squash/ racquet.