five screw puzzles by george hart —

Founded five screw puzzles by george hart models & stl files for printing
Dremel Chop Saw
StuartF619
Archimedes Screw Bonanza
MakerBotLearning
Hex Puzzle
alloria
Block Pin Puzzle
mtairymd
Nail Puzzle Box
mtairymd
Oleo 10  Art Deco
Lockwatcher
Cheese puzzle
Matthijz98
Nail Puzzle Box
totallyaddicted