Simpson Strong Tie EIPX-EZ-RP20 E-Z Click Drill in-Corner Epoxy Injection Port (20 per Bag) Comprised of a specially designed fitting and ports that take the mess out of your repair project The e-z-click injection fitting installs onto the end of the opti-mix mixing nozzle and clicks onto the e-z-click ports during injection Positive connection eliminates messy leakage, minimizing waste and clean-up No drilling of ports: e-z-click ports perform while pasted to the surface of the concrete