RAINPAL RBD020-SAW Rain Barrel Brass Drain Port Kit with Hole Saw NOT Lead Free Compliant, Designed for Irrigation with Rain Barrel, NOT for Potable Water Brass 3/4" Male Garden Hose Bulkhead Fitting and Brass Garden Hose Cap, using as rain barrel drain port. Fit up to 9 mm or 1/3 inch wall Comes with matching 27 mm hole saw. Inside is 1/2" female pipe threaded throughout