This Phone ring grip can be used on most smartphone and phone case, Brass metal joint allows ring to rotate smoothly, so it stays in good condition and does not wear & tear. Thick, smooth metal ring delivers a highly ergonomic product that is very comfortable to use. Powerful washing glue is used on the surface of the pad to hold any device up to 6kgs firmly in place. To reuse gel pad, simply wash the surface of it with water and air-dry until dry.