Make watch battery replacement and maintenance a breeze with this professional-grade blue rubber friction ball case opener. This versatile tool allows you to safely remove watch backs without causing any scratches or damage to the timepiece. The unmarked rubber ball provides just the right amount of grip to open various types of screw-back watch cases through simple friction. Perfect for both professional watchmakers and DIY enthusiasts, this tool eliminates the need for specialized case opening tools that might mar your watch's finish. The ball's ergonomic design fits comfortably in your hand while providing maximum torque for stubborn case backs. Its simple yet effective design makes it an essential addition to any watch maintenance kit. Whether you're changing batteries or performing routine maintenance, this rubber ball opener offers a safe and reliable solution for accessing your watch's internal components.