Swiss Army knives sound convenient but do you really need tiny tweezers, saws, a tack hammer and an auger (what ever that is?) in your pocket at all times? We didn’t think so. Stick to the essentials with the 4-in-1 key chain tool, Screwpop. Screwpop has built-in Phillips and Flathead screwdrivers, a hexagonal 1/4″ nut driver and the most essential tool anyone can carry, a bottle opener.