D stands for Dodecahedron, and 1 means 1 layer. CID1 means Clover Icosahedron plus 1 layer of a megaminx cut.
This puzzle has 72 axes of rotation, overstepping that of all other existing twisty puzzles. Most of the parts were molded while keeping their entirety, resulting a significantly better turning feel when compared with previous Clover products. It also combines jumble only moves with usual megaminx moves, adding to its challenge.
