It has been corrected to a fairly good condition.
When the bell hammer series comes into contact with metal and friction occurs, it changes the composition of the metal to a state with less friction. When the bell hammer series touches the metal and friction occurs, the bell hammer series changes the composition of the metal to a less frictional state, which eliminates ringing and reduces wear, thus prolonging the life of the parts.
As long as the bell hammer is used, the sound will subside and remain in good condition.