1Package Includes: This 9 piece wobble extension set includes: 2inch, 4inch and 9inch 1/4inch drive wobble extensions, 3inch, 6inch and 9inch 3/8inch drive wobble extensions, and 2 inch, 5inch and 10inch 1/2inch drive wobble extensions. 2Multiple Applications: This extension set is designed with wiggle head functionality. When part is inserted into the socket, it can swing at a certain Angle; When fully plugged into the socket, it can be used as an ordinary extension rod. 3Durable: The extended setting is made of durable heat treated chrome vanadium steel. These extension rods feature rust resistant mirror chrome plating for easy cleaning. 4Adjustable Wobble Head: The adjustable universal joint can change Angle and bypass obstacles into hard to reach fasteners, depending on your needs, it can reach tight Spaces. 5Convenient Storage Tray: The storage tray makes the tool set easy to transport and easier to store on the toolbox or workbench. The tray also allows it to organize quickly without losing it.