This is a training tool for javelin throwing. It comes with three tubes of different strengths, allowing you to train at the intensity that suits you. The grip is the same thickness as a men's javelin. *There are several available, so please comment if you want multiple (women's versions are also available).* These have been stored for several years. Please purchase only if you understand this. #javelinthrow #trackandfield #throwingevents #jabby