When replacing a watchband, or fixing one where the spring bar has gone awry, this super cheap tool and set of springs will come to the rescue.
Much like an eyeglasses repair kit, a watch spring bar tool is never around when you need one. Trying to push that tiny pin in and get the spring to engage, or disengage, is maddening. If I do not just break the spring bar and send bits a flying, I'll find some tool around the house to try that invariably scratches the lugs on my watch.
This cheap box of springs and a removal tool can sit in my desk drawer and just always be there. The set comes with replacement tips for the tool, and 108 spring bars in the standard sizes.