This is a thumb stud for easy one handed opening of the Leatherman Surge, Charge or Wave.

The gap is present for letting the blades lock when opening pliers. If it is removed, th stud will slide out a bit everytime the pliers are opened

Pressure fit! No need for glue! 
Though it may loosen if you remove it too many times. You could use glue if that does happen or just print a new one!

Infill: 100%
Supports: None 
Brim: None
Initial Layer height/ Layer Height: 0.08mm (can use any layer height, I just preffer 0.08 as model looks better)
Wall loops: 4

Fusion 360 file and stl file files given for easier remixes. 

This is a remixed model made originally made by SamuelSalgado77 and remixed by me. Link to original: https://www.thingiverse.com/thing:4702407

NOTE: USE 10% SCALING IF USING UNSCLICED FILES