I used to use some stainless steel hex lag eyebolt screws on my Clam 1060 pop up shelter. Still have the shelter and the screws are still in the suitcase there too. I have an old bit brace and also the eyebolt drive adaptor. I drill it in rather easy. The real problem was removing the eyebolt screws but an oversized flat head screwdrive leveraged into the eyebolt turns the screw very easy and out it comes.