IRWIN Tools 1877489 Impact Performance Series 6-Point Deep Well Socket Bit， 16mm， 3/8-Inch Square Drive<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Built for maximum durability and long life with impact drivers</li><li>Six-point deep wells with recessed corners drive torque across the flats for more secure fit and long life</li><li>Made from heavy-duty chrome molybdenum steel for maximum durability and long life with impact drivers</li><li>Thin wall construction increases access to tight spaces</li><li>Manufactured with heavy-duty， cold-forged， high-grade steel to withstand high torque output</li></ul></div><img src="http://ecx.images-amazon.com/images/I/312uakEc5pL.jpg" noproxy>