This is a brand new fully functional 4x4x6 Calvin's Puzzle TomZ Cuboid puzzle. it changes shape as you scramble it, which adds extra difficulty.
This is a high-order cube with degrees similar to the 6x6x6 cube. You can turn the cubes only if having the lines aligned (edges aligned). If you rotate without them being aligned, it may become disassembled. This puzzle is for professional cubers or collectors. For new cubers, you are not suggested to buy it. These puzzles are well made, but not meant for kids or new solvers, so they will break if not aligned properly.
