This premium red rubber ball by Bergeon  offers a simple yet highly effective solution for opening and closing screw-down watch case backs. With a diameter of approximately 67 mm, the textured surface provides excellent grip on a wide variety of metal case backs without scratching or marring the finish. The flexible rubber builds friction across the full back of the watch case, allowing you to apply balanced torque safely. It’s especially useful for quick access during battery changes, movement servicing or gasket replacement. Designed for ease of use in a professional bench environment, the red rubber ball slips onto the case back and, through a firm twisting motion, loosens or tightens most threaded backs. This tool is ideal for both hobbyists and watchmakers alike when a full case-back wrench is unnecessary.

BERGEON NO. 8009