The Capri Tools Wobble Plus Extension Bar is two tools in one. It can be used as a wobble extension bar when an offset clearance is needed or as a regular rigid extension bar. The wobble feature enables you to reach and turn fasteners that are obstructed and can only be reached at an angle. It allows up to 15 degrees offset. Spring-loaded ball detent holds sockets securely in place. When fully inserted (not at an angle), the extension bar locks into a regular rigid extension bar. Knurled non-slip grip is designed for hand turning loosened fasteners. These extension bars are constructed of premium Chrome Vanadium steel tempered with our proprietary heat treatment process to withstand more torque. Each item underwent careful polishing and protective plating process to achieve our own flawless MaxChrome finish.