ITEM NAME:3-jaw Watch Back Case Adjustable Wrench Opener Remover 16-48mm Repair img *{margin:0;padding:0;.1x watch back cover open jaw. High Quality watch opener,designed to remove the back lid from watch without marks or scratched. 3x square fixture. 3x flat fixture. 3x round fixture. This tool is ideal device fo replacing batteries for any other watch repair Specification.