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Yep h!! Same size 12 mm drill bit...buy them 75 mm in length when you have drilled the holes have a piece of garden hose around 500mm put some protective glasses on and blow the fine cement dust out of holes to give a better bit into the concrete with the dyna bolts...
Know building houses all the time I have seen dyna bolts with a Allen key depression in the top of the dyna bolts these are fantastic as you use the Allen key and the spanner to tighten till the dyna bolt bits in ( man they are a pain when they start to spin...)...i haven't seen these dyna bolts here in nsw for sale but a project building mob come down from qld and we're using these.best thing I'd ever seen...
Just see if there up there in masters or bunnings...also galvanised are better
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