A wall hook can hold up to 150 pounds of weight depending on the material used and the wall strength. You may need to be extremely aware in case of drywall that can hold limited weight. You need to push, set, and hang the stuff to the walls in such a case. The right metal design will be able to achieve the best results irrespective of the type of wall. In the case of studs, these can support weights up to 100 lbs. Larger versions of the hooks using angled nails can hold a heavier weight.