Gardner Bender 45-PMBUVB Push-Mount Base, Fits &frac14; inch Hole, 5/16 x 9/16 inch, 10 Pk, Black For use at temperatures not exceeding 85 deg C (185 deg F) Engineered from improved Nylon 6/6 Push mounts install easily into any 1/4 inch hole Centering ears and locking barb design hold it securely in place Can be used with all self-locking ties up to 14 inches and 75 lb. tensile strength