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Our SHOCKWAVE Impact Duty™ Socket Extensions provide you with better access in hard to reach places and offers extreme impact durability in high torque applications. Our 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. All MILWAUKEE® SHOCKWAVE Impact Duty™ Socket Extensions are backed by our Lifetime Guarantee and meet ASME industry standards.