Afras 10003 1/2" Chrome Plated Brass Rope Eye Hook Holder with Anchor and Plug is a 3-piece set of hardware (loop hook, anchor, and plug) designed to be installed into a concrete swimming pool wall. While this design is used primarily for securing swim racing lanes and pool safety ropes, it may be used in conjunction with other pool equipment as well. For best results, verify the requirements of any pool equipment attachments prior to installation.