These cricket balls are used for fast bowlers, spinners and wicket keepers during their practice sessions.
Bowlers should do not more than 12 balls a session and just use it for warmups. You don’t need to run and bowl.
Advantages : These balls can improve working muscles and can improve arm speed
Disclaimer :
Don’t use these weighted balls on hard surfaces since it has iron in side and at the same time avoid this in water since these balls are 100% leather balls
