Williams Flextensions drive extensions from Snap-on Industrial Brands are designed for hand and power tool use by technicians who work with engine and heavy-equipment manufacturing, assembly and repair. Features include a black oxide finish, TIG-welded socket retention pin that provides full rotation power to the socket, a 7/32-inch cross hole, and bevel drive end. The extensions are available in a variety of SAE and metric socket sizes and extension lengths, in both 1/2-inch and 3/8-inch square drives. 800/446-7404; www.snaponindustrialbrands.com.