Now mass-produced by Mefferts
CAUTION: FOUR SPECIAL EDGES ONLY. Anisotropic Cube is a modification of Oskar's Gear Cube that is being sold by Mefferts.com. Buy a Gear Cube
and replace four of the gearing edges by these four pieces. The result is a puzzle that has all the gearing fun of Gear Cube, but much harder to solve.
Watch the YouTube video
Read at the Shapeways Forum
Read more at the Twisty Puzzles Forum
These are just the four special pieces. If you want to buy the full puzzle, assembled and sticked, then search the internet for Mefferts and "Gear Cube Extreme