Bolt-Grip 1859106 Irwin Tools Impact Performance Series Bolt Grip Bolt Extractor with 3/8-Inch Square Drive with 1/4-Inch Hex Adapter<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>IMPACT performance series bits don't just work with impact drivers. They are designed specifically for them and the higher torque they produce</li><li>Reverse spiral flutes grip harder as resistance increases for maximum grip power</li><li>Constructed of premium high-carbon steel for durability and extended drilling life. Black oxide finish resists corrosion</li><li>Universal lobular design fits all types of fasteners. Square drive fits impact wrenches， or drills and impact drivers when used with included adapter</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31M6J9i0XQL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/71VSOWykpZS.png" noproxy>