After many years and many injuries.....thankfully I still have all my digits... I have realized that you should not just get a wall cabinet of stuff. just a waste. you need to get a cabinet of some sorts to keep it safe but you need to tailor it to what you are doing. for example in my woodshop I have emergency gear only. for example major trauma like cutting off a finger = plastic zip loc bag, ice pack, paper towel to wrap it in. Also have packs of stop bleeding stuff and tourniquets.
But in my car shop I have two fire extinguishers and gauze pads.
I always have my cell phone within reach.
in both I have ear , eye, facemask, dust protection.
the things on the wall are usually required in some businesses but you really need aspirin and band aids that are 4 times as expensive? also depends on location and how long help takes to get you