This is the core of the Doctor Skewb. You will also need to buy the pieces in this model to assemble the finished Doctor Skewb: Doctor Skewb 2of2.

This puzzle requires no hardware to assemble and you may purchase stickers for this puzzle here.

It has also proven to be a very interesting challenge simply to restore this puzzle to the cubic shape without the clues given by the stickers. For those interested in that challenge you can purchase shiny silver (or mirror) stickers here.

Read more about this puzzle on Twisty Puzzles in this thread, or this thread where the idea for the mirror stickers was first mentioned.