Made of durable stainless steel. the Nite-Ize DoohicKey features a half-dozen tools that do everything from tighten bolts and screws to open a bottle of refreshment. all in a simple key tool that fits in the palm of your hand. On one end of the DoohicKey is a sturdy carabiner clip. allowing you to attach keys to it. or attach the DoohicKey itself to any loop or ring. Opposite the clip is an etched ruler for on-the-spot measurements. and the carabiner opening is strategically shaped to function as a wrench. On the other end. the DoohicKey features a bottle opener. a flat head screwdriver. and a box cutter. With a streamlined. clever design that makes it easy to carry. attach. remove. and reattach. its a handy tool to have.