This stainless steel watch band tool will help you get those little spring bars in and out of your watch casing. If you just shot a spring bar across the room and lost it in the carpet, you can buy more here.
“It's certainly handy to have this spring bar tool. It comes with an extra set of tips which is nice. The tips screw into the handle. However, they are round. It would be good for the tips to have hexagonal shafts so they could be tightened in place with a small wrench or pliers. The handle itself is hexagonal (like a pencil) so that it won't roll off the table. Overall build quality is OK, not like German precision hand tools, but that's fine because A) the price is low, and B) for me this tool is only needed occasionally.”