Bosch T3925SC 7 In. Extension SDS-plus for SPEEDCORE Thin-wall Core Bits<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Core bit extension</li><li>7 In. extension， SDS-plus</li><li>Screw core bit onto shank</li><li>Works with thin-wall core bits， 1-1/2 In. or larger</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31rJhOYGYgL.jpg" noproxy>