3/8" Dr Flare Nut Crowfoot Wrench Metric Imperial Option:15-19mm; 3/8"-7/8"

Also used in place of conventional open/box wrenches where the wrenches are large, so the crow's-foot wrench is much cheaper, or where space and weight are at a premium. Imperial: 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 1", 1-1/4".