The strength of the bracket can vary and the same can as a result in strength from mere 10 lbs. to several hundred. It is important to consider so that you can consider what kind of wall bracket you may need. Always look at what you are storing and as a result, it can help you to get the most desirable results for your needs. If needed, you can opt for more than one bracket to get the best results.
For instance - shelf brackets are ideal for closets, garages, sheds or similar shelving needs. Therefore, it is compatible with wood, plastic or even metal shelving and can bear above 100 lbs. weight.