Filters
Houdini's Torture Cell - Brian Young
Cross Threaded nut and bolt - Brian Young
Amazing Bolt - unknown
Stripped Nut - unknown
Double M - unknown
Trilateral triangle heavy metal burr - unknown
Foursquare - unknown

Burr / Wood

Designer: unknown
Maker: Zoyo

Brass Cannon - unknown
Answer Box - Benno de Grote
Stretchy Metal Snake Cube puzzle - unknown
Fortress interlocking puzzle - unknown
Ring Road metal interlocking puzzle - unknown
Wan Puzzle high level metal take apart - unknown
Cross-Hatch 4 piece metal burr - unknown