combination wrench is a type of wrench that has an open-end jaw
on one end and a box-end on the other. Both ends are the same size.
Combination wrenches are available with 6-, 8-, or 12-point box
ends and with or without offset open ends and handles. Two sets
of wrenches should be part of any automotive tool kit, one for holding
and one for turning. The combination wrench is a good choice for
the second set as it complements either open-end or box-end sets.