A true marvel of engineering is the Griffin Adventure Tool made of titanium. A keychain-sized tool that can replace an entire drawer. You can clip this tool to your belt, backpack, keys - anywhere. There's a whole 12 tools in one: a Phillips #2 screwdriver on the top corner and a flathead screwdriver on the base, a bottle opener, a 1/4 inch bit holder and three different hex wrenches - 8, 9 and 10mm, and a nailer. The 5/16 inch wrench has a special ring notch inside, you can use the wrench even with your keys hooked to it. For accuracy lovers, there is a ruler with graduations to 1/16 inch on the sides of the tool. The tool can be taken on a plane, no safety issues - a true travel companion. The tool is lightweight, durable, and corrosion-free.