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You might never use another screw back case opener after you try one of the special balls to open screw back cases! No set up time at all. Just place the watch in the palm of one hand and press ball against the case back to screw off the case back. In about five seconds, the case back is off, without leaving any marks or scratches on the case. Then you can close the case watertight just as easily.
A watch that has been used for a long time can get dirt and oil in the case threads, and become difficult to open. The strength of your hands is also a factor, which may make the case difficult to open on the first try. For difficult to open watches, another tool may be needed to open it the first time. What this ball does for you is allow you to open most cases without having to set up another tool and run the risk of scratching the case back.
Squeeze, press, turn, and remove even stubborn waterproof casebacks with ease.
Completely safe for all finishes - will not scratch or mar.
Great alone or in addition to a bench-mounted caseback opener.
Extremely 'sticky' surface for maximum gripping strength.