Two tools in one: use as a wobble extension bar when an offset clearance is needed or use as a regular rigid extension bar Wobble feature lets you reach and turn fasteners that can only be reached at an angle up to 15 degrees Spring-loaded ball detent holds sockets securely in place; knurled grip for easy hand turning loosened fasteners Premium Chrome Vanadium steel tempered with our proprietary heat treatment process to withstand more torque; coated with our corrosion resistant chrome plating Three 1/2 in. drive wobble extension bars: 5, 10, and 15 in. long