five screw puzzles by george hart —

Founded five screw puzzles by george hart models & stl files for printing
Marble Run Sliding Puzzle
Coffreedom_Official
Sun and Moon Secret Box
Multiverso 3D
Siege of Alesia
kylemakesstuff
Gear puzzle
KlopDesign
Half Dome puzzle
PG3Dprinting
Flat Pack Foxes
Physics Dude