I read somewhere That You'd Better use aluminum screws (instead of the plastic originals) in some ocasions. When I mounted my GoPro on my bike I knew why. The plastic screws can not be tightened enough. The camera will not keep steady on a carbon bike and Loosens. With These aluminum screws That problem is solved. And with the wrench you do not need to be afraid not getting them loose again When your ride is done. Good stuff!