Jacobs 3653 K3C Thumb Handle Chuck Key with 5/16-Inch Pilot-Size for Jacobs Series 34-33C ，633C Keyed Chucks<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Nickel thumb grip styles increase leverage and user comfort</li><li>Soft steel handles limit the potential for dangerous fracturing under excessive load</li></ul></div><img src="http://ecx.images-amazon.com/images/I/410LzKx3mNL.jpg" noproxy>