Craftsman 19pc Universal Max Axess Socket and Ratchet Set 3/8&rdquo; Drive Pass-thru system delivers deeper than deep well torque Makes turning nuts down threaded rod easily Spline geometry works with 4, 6, 12 point, spline, external Torx and rounded standard fasteners Pass-thru ratchet is up to 40% stronger than traditional builds Crafted from high tensile strength alloyed steel and featuring a load dispersing ridge pattern Black oxide finish prevents rust, while smooth polished surfaces reduce friction against surfaces