I needed one of these for 5/32 and 9/64 semi-tubular rivets. Kind of stupid, they don't even specify what rivet size the tools are for. I took a chance and bought a set and they are all too big for the rivets I use. The tools are probably correct for what they are, but be aware that 5/32 or 9/64 will not work with this set of tools. All are designed for larger rivets.