Featuring an integrated (non-removable) design of the drive extension and socket, Williams Flextensions increase productivity by allowing reliable, continuous workflow without concern for the socket disconnecting from the extension. Available in a wide variety of both SAE and Metric socket sizes and extension lengths, in both 1/2- and 3/8-inch square drives, most are available in “Tension” and “Non-Tension” models. Features include: durable black oxide finish, sockets feature SUPERTORQU lobular openings for greater turning power without deforming the fastener, TIG welded socket retention pin provides full rotation power to the socket, 7/32-inch cross hole and bevel drive end for easy use, up to 30-degree angle offset, and designed for hand and power tool use (impulse or direct drive); not for impact tool use. For more information call (800) 466-7404 or visit http://www.snaponindustrialbrands.com/30/home.htm.