dual direction bolt —

Founded dual direction bolt models & stl files for printing
Adaptable Hex Bolt Wrench
3rDesign Works.com
Restraining Bolt
MakerDan
Knob Bolt M4
Perinski
Lightning Bolt Easy Quick Print
3DManufacturingHub
Love Nut and Bolt
Inventorsquare
M15 Nut and Bolt
Freddy Dev
Brickyard Compatible Bolts
Rexington Beowulf