Squeeze the ball, make friction between the ball and the back case, and then rotate the ball to the case open direction;This is a watch repair tool, not a toy ball, only use to open the screw thread back watchcase;Diameter: 8cm;It is squishy, tacky and creates a large contact area with the watch case back;Easy to use, simply squeeze, press, then screwing

• Veroda Watch Case Opener Sticky Friction Ball Type Back Case Opener Tool Watchmaker

Veroda Watch Case Opener Sticky Friction Ball Type Back Case Opener Tool WatchmakerVeroda