While the term “dog tag” has traditionally applied to either walking pets or identifying casualties of war, now they also refer to wearable universal tools. The simple, straightforward and smartly practical design of Prometheus Design Wear’s Standard Issue Dog Tag Tool is that of a basic closed-end wrench, made of titanium. Described by the PDW as “one of the lowest profile bottle cap lifter designs on the market,” after its first production run the Dog Tag Tool has already sold out. Check back for your own titanium, less-than-half-ounce weighing wearable tool on a steel-ball chain here.