Williams 36004 3/8-Inch Female by 1/2-Inch Male Impact Adapter<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>3/8-Inch female by 1/2-Inch male impact adapter</li><li>Overall length of 1 5/16-Inch</li><li>Specially heat treated for impact use to provide long life， safety， and durability</li><li>Features ball socket retention for fast socket changes</li><li>Suitable for use with pneumatic and electric impact wrenches</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41UX1lIoT8L.jpg" noproxy>