The Mission wallet is to hold coins, http://www.bladeart.com/mission-tac/mission_wallet/mission_wallet.htm . The Fisher wallet holds dollar bills and ID. The Nitroglycerin is pill form for heart patients and is not explosive. I have not found a good key ‘wallet’ yet and am still looking so that every thing would be containerized and not cause holes in my pockets.
I keep my back pockets empty so I do no pinch the nerve in the back of my legs when I am sitting down, as this causes my legs to tingle and ‘go to sleep’.