★★★★★

Sufficiently strong if you want a lock box for valuables (e.g. phone, keys, wallet) while at the beach, the pool or the gym. I secured it to my beach cart and locked it whenever we were in the water or walking on the beach. The box is a good quality plastic and would take some effort to break open. Beats caring everything with me. Granted, a thief could take the whole cart or could probably break the box open with a hammer, but that would get someone's attention at most places.