ADRawli

I used self tapping metal screws that make their own holes as you screw them in.  i did not use a hammer drill, which probably would have made the process easier.  Instead, I just had to lean on the drill/screw a bit harder until it started to dig in.  Once it starts going in, it snugs up real secure.  Just make sure you start it in the right place when you do so, as you don’t want too many holes in your frame if you can help it.   
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