the.com/combination wrench

means A single wrench with an open end on one side and a closed loop (box end) on the other, both sized to fit the same bolt.

from Straightforward trade language rather than a storied coinage: 'combination' simply names the tool's job of combining two classic wrench styles — the open-end (an open jaw descended from early adjustable and fixed spanners) and the box-end (a closed ring that grips all six or twelve points of a bolt head) — into one piece of steel. The word 'wrench' itself traces to Old English 'wrencan,' meaning to twist or wrench, which is exactly the job it was named for.