I had no problems with the supplied self tapping screws/screws. I decided to try the included bolts/screws before going to Ace for stainless steel self tapping screws. If the supplied bolts/screws rust, I can try the stainless ones. I used a cordless drill with a torx bit and they turned quite easily. I suppose you could cut them off if you decide to over tighten them, but on my truck you would pull the strings out of the bed sides before cutting the bolts/screws.
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