1 Pcs Badminton Racket String Meter String Machine Tools & 1 Pcs Badminton Racket Stringing Tool Fly Clip Wire Clip                1 pcs Badminton Floating Flying Clamp & 1 pcs Tension Calibrator     Easy to operate     Feature:Keep your reference tension in check with the tension calibrator stringer tools.A must have for proper stringing machine maintenance.     A racket that has just been put on the line or used for a period of time, usually the midpoint value of the beat value measured by the pressure gauge is too small, and the pressure value around the beat tends to be more pounds, compared to the horizontal line, vertical The line's beat value tends to be more pounds.          1.Small and exquisite, the appearance is novel.     2.The clamping force can guarantee more than 30LBS.     3.Resistance to falling and long service life.     4.More in line with the racquet horizontal line width requirements.     5.After the racket is broken, the flying clip can be used to re-clamp the broken part, and then the X-shaped cut line is used, and the racket is not deformed.     Therefore, we usually use the measurement of four weeks (vertical line at 2/4/8/10 o'clock) to understand the beat value of the racket.     How to use: In the first step, rotate the disc counterclockwise to zero the scale;     In the second step, the two small cylinders of the pressure measuring device are perpendicular to the surface of the racking surface and inserted in the cross direction;     In the third step, turn the pressure gauge clockwise. When the vertical line is placed in the arrow of the manometer, it is enough to find the scale value of the corresponding dial.     colour:black & Silver     Material:stainless steel & PVC     Badminton Floating Flying Clamp size:10 x 5 x 4.3cm          Package Contents:     1 x Badminton Floating Flying Clamp     1 x Tension Calibrator     Note:     that the beat value is not exactly the same as the pound value, but some points tend to be pounds.          Only the above package content, other products are not included.     Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.