Westward 4YR19 Box End Wrench Set The 4YR19 is a 7-piece SAE box end wrench set. The wrenches range in size from 1/4 inch to 7/8 inch. The wrenches are not insulated and have a satin finish. Size / 1/4 inch to 7/8 inch Finish / Satin Insulated / No Number of Pieces 7 PC