If you need to install more than a few Camloc 4002 Series Grommets, you can save your fingernails and fingertips with this special tool. One easy motion aligns the retaining ring to the grommet and pushes the ring in place. Works with both the Standard 4002 Series Grommet Retainer Ring (Part No. 6084) and the High Shear 4002 Series Grommet Retainer Ring (Part No. CAMR4T). Illustration also shows the a retainer ring, sold separately.