This mirror is held up with two of the larger hooks and it’s heavy - over 8kg - no issues and no worries.
That is marginal at best. Those hooks are not designed for anything that heavy. As long as it works you are proving they can handle it though.
I’ve used them a lot with no issues except for the one mentioned and it was a cheaper type of hook. I will report any further issues. Oddly the last heavy mirror I put up, I used thunder bolts - and would recommend them for heavier stuff.
@Airhead started
London Fixed Gear and Single-Speed is a community of fixed gear and single-speed cyclists.
This mirror is held up with two of the larger hooks and it’s heavy - over 8kg - no issues and no worries.