The most useful bracelet ever made is available at Military1st.co.uk, the Leatherman Tread Metric Bracelet... "Leatherman Tread Metric Bracelet is available now at Military 1st. Stylish, functional and fully customizable, Leatherman Tread is a travel-friendly wearable multi-tool made of durable 17-4 stainless steel, featuring 29 tools with commonly used metric sizes, and comes with 25-year manufacturer's warranty.