The real thing.
These are IronMind's popular Level 5 Red Nails for bending. They measure 7" x 5/16". You can buy them singularly or in a bundle of 5 or 25.
For the truly insane benders. The Gold Nail is the pinnacle of IronMind's bending challenge. This monster measures 8-3/8" x 3/8". The Gold Nail debuted in 2011 and so far nobody has officially certified. Train to be the first!
Consider pairing with IronMind's official cordura bending pads.