Watch Back Case Opener: Opening watch case backs with ease using this friction ball.
Easy to Use: Hold the watch in one hand and in the other hand, press the friction ball onto the back of the watch. Start twisting to unscrew the watch back.
Diameter: 2.95 inches in diameter(75mm).
Upgraded: It will never scratch or damage your watch, will not leave marks.
Watch Repair Tool: This is a watch repair tool, not a toy ball, only use to open the screw thread back watchcase.