Metric Combination Wrenches

combination wrenches
(Combination wrench) A wrench or spanner is a tool used to provide grip and mechanical advantage in applying torque to turn objects—usually rotary fasteners, such as nuts and bolts—or keep them from turning.
(combination wrench) (a crescent or ring on each end)

metric
measured: the rhythmic arrangement of syllables
A system or standard of measurement
Metric units, or the metric system
A binary function of a topological space that gives, for any two points of the space, a value equal to the distance between them, or to a value treated as analogous to distance for the purpose of analysis
based on the meter as a standard of measurement; "the metric system"; "metrical equivalents"
metric function: a function of a topological space that gives, for any two points in the space, a value equal to the distance between them