
Any thoughts on what can we do?
Use a dremel or similar to cut a slot in them then use a decent fitting flat blade screwdriver
How long does it take to cut the slot? And how do you make it wide enough to accept the screw driver?
They are like a miniature grinder, into which you can fit a thin cutting disc, around 1" diameter. You can cut a slot, then widen the slot out to accept a screwdriver blade. It only takes a few seconds.
the heads have gone on bolts
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