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Rubber bands do sometimes work but they won't in this case because the screw is too small and the driver will poke right through the rubber band with the application of any pressure. Get a proper Y000 driver, don't use Y00 as someone suggested.While I did have some success filing down a cheap tri-wing driver until it fit the screws, there was one screw that it wouldn't loosen.
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UPDATE: after finally finding a proper Y000 driver at a local electronics store I was able to complete a repair on an Apple Watch series 3. every attempt that fails to turn it will take a little more metal from the screw. Remember though, don’t keep trying bits that don’t grab right away. If you take some fine sand paper and sand or file the tip flat so that when you look at the end of the bit under a light you’ll see a “Y” shape that’s rather thick or “bold”, instead of a sharp point, or a very thin “Y” shape that’s not well defined. The problem is that most of the drivers are too pointy, and the screws arw nowhere near as deep.
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