Half Turn Tetra is an edge-turning tetrahedron, suggested by Andreas Nortmann. If this puzzle was a shape-mod of a regular 3x3x3 Rubiks Cube, then it would shape-shift. However, the internal mechanism allows only 180-degrees turns. This way, shape-shifting is prevented.
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Read more at the Twisty Puzzles Forum
Please contact Oskar
directly if you are interested in obtaining a fully colored, stickered and assembled sample of this puzzle.