Clamp mouth size can be adjusted by rotating the knob to fit for most phone and tablet pc. Features: Versatile screen fastening clamp clip.Used to clamp your repaired device. Rubber padding inside help no chance to scratch your phone screen. Help the replaced new screen in its right place, not bulge or sink.Make the screen to joint with the frame perfectly. and high quality.Quality Materials made, more and tougher than those in plastic., Manufacturer: Akfldms