The Azan Harmless Hexagon Butterfly Knife fits most common bolt and nut sized hex's. It easily fits in your pocket or you can keep it in your car for on the spot uses. Ships without a sharp edge and can be good for practicing to flip. This tool has hundreds of uses and we love to hear about what our customers have used it for. You can have this for unexpected situations and the tribal pattern on the handle will keep it looking good. Features a handle lock and fits four sizes of bolt and nut heads. Overall Length: 5 Inches (Closed). Fits: Four Different Size Hexagon Bolt Heads. Handle: Aluminum, Tribal Design, Anodized Black. Features: Handle Lock.