Our Shockwave™ Impact Duty™ Retaining Rings are optimized for a variety of impact socket sizes when you require additional socket retention on 3/4 or 1 in drive impact wrenches. The convenient one-piece design and flexible rubber material make the installation of the retaining ring hassle-free. It's necessary to use the proper retaining ring for each socket size. Milwaukee® Shockwave™ Impact Duty™ 49-66-6743 Flexible Retaining Ring, 3/4 in Drive, 1 pc