Features and Benefits:Optimized for use with 1/2" drive impact wrenches;Made with forged impact steel for durability in high torque applications backed by our Lifetime Guarantee;Dual hole design and groove for easier attachment;Laser etched markings for easy identification;Ball deten design for superior impact socket retention;Lifetime Guarantee covers impact sockets and extensions only;Meets ASME Industry Standards;For use with Impact Sockets;Laser etched part number;1/2" drive 10" extension for further reach;The MILWAUKEE® SHOCKWAVE Impact Duty™ 1/2" Drive 10" Extension provides better access in hard to reach places and offers extreme impact durability in high torque applications. The laser-etched size markings allow for fast identification of drive size and length. The dual-hole design and ring groove allow for easy attachment and removal of the extensions. All SHOCKWAVE Impact Duty™ Socket Extensions are backed by a Lifetime Guarantee and meet ASME industry standards.