20 Pack Solar Panel Mid Clamps 1.06" for Secure Mounting - Ideal for Rooftop & Ground Solar Installations

I was making a DIY solar ground mount out of wood and needed clamps to hold my four panels down. I just provided my own screw and and two washers per clamp (since the hole in the clamp is too big for my screw heads). These clamps are intended to be used in between panels, but I used a small section of 2"x4" lumber on the outsides so I could use these clamps for both outside and inside positions (see pictures). They hold the panels down very securely. I was thinking about just using screws and large washers as clamps, but these clamps do a much better job and were not expensive.