Milwaukee Shockwave 3/8-Inch Drive Impact Socket Extension provide you with better access in hard to reach places and offers extreme impact durability in high torque applications. This laser-etched size markings allow for fast identification of drive size and length. The dual-hole design and ring groove allow you to easily attach and remove the extensions. Stamped and ink filled diameter markings for wear resistance. It has ball detent design for superior impact socket retention. Size: 152 mm.