Digital display steel hook core tester: this product is suitable for measuring the longitudinal bending stiffness of the shoe hook, the principle is to fix the heel end of the hook core, the front end of the load, so that it produces bending deformation, and then measure the bending deflection of the hook core, to calculate the bending stiffness of the hook core, the instrument is lightweight and durable, easy to operate, good maintenance, the measurement can quickly measure the accurate hook core stiffness