Bosch EX1012 7/16 In. x 12 In. Straight Shank Extension<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>12 In. straight extension shank</li><li>Dimensions 7/16 In. x 12 In.</li><li>Rugged， high-quality materials to withstand tough concrete applications</li><li>Maintains bit integrity at impact point</li></ul></div><img src="http://ecx.images-amazon.com/images/I/21oLTdq9uBL.jpg" noproxy>