I used some rafter hangers to put up the mezzanine in my new workshop. Initially I just fixed them in place with some 40mm 3.5 screws. However on the rafter hanger was written to use square twist nails. Being a bit of a novice at this I’d never heard of square twist nails so I decided to investigate.
I bought a couple of bags from my local hardware store and set to it.
They are an absolute thing of beauty. They twist as you hammer them in and everything! Those rafter hangers are not coming out again!