bolt pen —

Founded bolt pen models & stl files for printing
M6 male knob
NPI_3dprint
M7x20 Bolt  Screw
G-workz3D
M8 knop
AndersV209
M16 Bolt and Nut
Blackbird88
Best Desk Organizer
Ideal_nerd
TRex Pen Holder
paper_faces
LowPoly Extinction
XYZWorkshop
Proto Pen Holder
Steveon15