What are dheadnails? I don't even know if they exist, I just happen to read...

I don't even know if they exist, I just happen to read the term on wikipedia and thought it sounded interesting.
What is this clear entity that come beside...
Answers:    D-head or another pet name is clip head nail are used in power nailers. Power nailers own there nail glued togeather within a strip. They clip off member of the head so it will slide ancient the next pin in row on the strip.
I want to equip my two toilets near...
I don't see duplex nails or forming scheduled in types of nail so that is probably what wiki method. May also be a slang for clipped head framing gun nails-thought the shape is more 3/4 circular.