Measure before ordering -- These wrought iron patio chair leg caps for metal chairs are designed to friction fit into the bottom of your existing wrought iron patio furniture feet and slide smoothly. Your lawn furniture will glide on the surface instead of scratching. These replacement leg caps fit inside a round steel weld cup with an inside diameter of 1-1/2". When measuring your chair’s weld cup, measure the inside diameter. A ridge circling the outside of the part will be shaved off when installed assuring a tight fit and securing the glide in the weld cup. Installation Tips Use pliers to remove old plastic chair leg caps. Clean all dirt and rust off the chair foot before installing the new cup. This will help make installing the caps easier. Insert one of the cups at an angle in the wrought iron chair foot and press the other side in. You can also use a rubber mallet to smack them in. If necessary, soaking the glides in hot water helps to soften them up making installation easier.