Sonic wrenches are made from Chrome Vanadium steel for strength and resistance to the elements and chemicals. Hinged socket wrenches offer the benefits of a ratchet and socket with a different size on each end. Seven wrenches cover metric sizes from 6mm-19mm. Twelve reversible ratcheting wrenches include a reversing lever to change directions without turning the wrench over, with ranging sizes from 8mm-19mm. Flare-nut wrenches from 8mm-27mm and star wrenches in sizes from E6-E24 complete this Sonic 30-piece wrench set. (603003, 603003-CE)