Four handle rivets. A VERY recent discovery has shown that there are four (!) pop rivets in the handle area in between the grips of Luke’s ANH hero saber: two small (2.4 mm) plus two larger (3.0 mm) rivets.
This set contains all 4 rivets to replicate this ultimate geeky detail! You might also want to get the Double rivet D-ring with clip.
See the updated blueprint with details here.