A versatile Key-sized multi-tool that attaches to an existing key chain or strap.0.4oz 64.8mm x 17.2mm x 2.5mmWeight: 12g The Nite Ize DoohicKey Keytool features half-dozen tools that do everything from tighten bolts and screws to opening bottles, 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.  It functions as a box cutter, a bottle opener, a wrench (1/4\", 5/16\", and 3/8\"), a ruler (inches and centimeters), and a flat-head Screw Driver. Secure Stainless Steel constructionAvailable in Black or StainlessTSA FriendlySize: 2.6\" x 0.7\" x 0.1\"