These patio furniture leg levelers have a 5/16"-18 thread and a shaft that is 1/2" long. The diameter of the nylon base is 1". This size replacement screw-in furniture feet are commonly used with American-made furniture and will generally not work with imported furniture from big box stores.
Our threaded adjustable screw-glides are made with stainless steel and come with a non-skid black nylon base. They will not leave marks on your surface. They will help level your table and chairs and get rid of the wobble.
To make sure you are ordering the correct size, we recommend taking one of your current glides to the hardware store to screw on a 5/16-18 nut to confirm this is the size you need.