Milwaukee Shockwave Impact Duty socket set, standard, impact rated: yes, measurement system: metric, 14 pc, 6 points, included socket size: 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 21 mm, 22 mm, 26 mm and 27 mm, 1/2 in drive, hex socket shape, case, for use with: 1/2 in drive impact wrenches, drivers, ratchets and adapters, forged steel, black.