I made this into a bed and shelves for my van. Using 3/4" plywood, the butt joint with these screws driven through the corners and shelves is completely solid and lighter than expected. For the bed I used 3/4" thick plywood and 6 pieces of 4x4 rods cut to length for the legs, I just put 3 of these screws through the plywood in each leg and it's very strong. I really couldn't ask for more. I didn't remove any of them with the power driver (which could be a problem if the screws aren't strong enough).
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