This tool set includes 6 double offset box wrenches. These industrial black wrenches come in a kit bag. Double Offset Box wrenches are Drop Forged from steel bar. These wrenches are available in fractional sizes only from 5/16" through 3/4" in Short Pattern, and from 3/8" through 1-1/2" in Long Pattern. These wrenches come in a short pattern and long pattern. These are general purpose wrenches, which have 45 degree double offset 12 point box openings at each end. The openings are of different convenient sizes. Use these wrenches generally for final tightening and when obstruction clearance is required.