Selection of impact square drive convertors, comprising both male to female and female to male, covering all drives from 1/4"D to 1"D. Step-up adaptors: 1/4"D (F) to 3/8"D (M), 3/8"D (F) to 1/2"D (M), 1/2"D (F) to 3/4" (M), 3/4"D (F) to 1"D (M).Step-down adaptors: 1"D (F) to 3/4"D (M), 3/4"D (F) to 1/2"D (M), 1/2"D (F) to 3/8"D (M), 3/8"D (F) to 1/4"D (M). Manufactured from chrome molybdenum with black phosphate finish. Supplied in a purpose built metal storage case.