Bottom diameter: 56mm/2.2inches, meeting most working needs. | Put the suction cup on the screen and presses the TAB, rubber and the screen get together nicely then pull the TAB. | industrial plastic and thick rubber, durable, not easy to bend, super suction, long service life. | Suitable for most electronic screens, glass, metal, and other smooth surfaces. | Professional repair tools to make your phone or tablet repair and screen removal quick, easy and successful.