I made this pins for the Balisong print here https://www.printables.com/model/215729

I don't have a printables account. The original normally uses M3 screws or something but I didn't feel like going to the store to get some so I made pins.

They are 2 different sizes since the Balisong handles have different size holes. They are mostly a friction fit, at least when I printed them but I left them a little long so you can heat up and smash down the ends to form a sort of rivet top.

I printed them at .1 layer height, 210C, bed 60, .4mm nozzle and I used my Kingroon PLA+ but only because I'm trying to get rid of it. I recommend a brim unless you are confident. I also added 2 extra pins since they are very small and prone to breaking when pulling them off the brim.