It could be anything. There are dozens of after-market security bolt designs so finding the correct key will be looking for a needle in a stack. I suspect it'll come down to the brute force methods. Tyre fitting depots oftm have a load of different keys for popular systems so a visit there might be worthwhile. They get it out one way or another.
TC
Last edited by T-Cut; 23rd August 2019 at 21:28..
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