I used these to attach Trex composite panels where concealed fasteners could not be used and they worked great. There are no plucked heads and they sink easily. I also ordered trapeze bolts after reading these reviews but they were shorter and I had such success that I didn't use trapeze? spelling screws. I can't understand some of the negative reviews listed here. I highly recommend this product and am not affiliated with any company as I am just a weekend carpenter who recently replaced a wood deck with Trex composite. I recommend using caulking tape along the top of the joists.
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