Small, durable, fits in your pocket and can be used in a myriad of useful ways. Really. The stainless steel DooHicKey combines a half-dozen tools that do everything from tighten bolts and screws to open a bottle of refreshment and more, including a Box Cutter, Bottle Opener, Wrench (1/4", 5/16" & 3/8"), Metric and Standard Ruler, and Flat Head Screw Driver, all in a simple key tool that fits in the palm of your hand. A sturdy carabiner clip allows attachment to keys, or any loop or ring. A streamlined, clever design that makes it easy to carry, attach, remove, and reattach, it's always as at-hand as it is handy. 2.6"×0.7"×0.1". 12g.