Adapter Sizes (in inches): 1/4 (F) x 1/4 (F) Hex, 1/4 (F) x 3/8 (M), 3/8 (F) x 1/4 (M), 1/2 (F) x 3/8 (M), 3/8 (M), 3/8 (F) x 1/2 (M)
Universal Joint Sizes (in inches): 1/4, 3/8, 1/2
Chrome vanadium