Features: Unique Design: The wrench’s jaws are designed with return tabs for better leverage or more grip to slide easily over your fasteners Extended Range: The crows foot wrench set extends the range of a standard wrench to inaccessible fasteners in tight spaces that are normally inaccessible. Once in place, an existing ratchet, extender or torque wrench will attach to the crowfoot drive holes to drive fasteners. Metric crows foot wrench set are 100% compatible with existing metric 3/8” and 1/2” drive tools to meet all your needs Specifications: *Product Name: Crow foot nut wrench *Material: Chrome-molybdenum steel *Size: 8-24mm 8mm to 18mm for 3/8 inch drive 19mm to 32mm for 1/2 inch drive *Color: Black Package Contents: 19 pieces of nut wrenches 1 * Plastic case.