Puzzle info.:

We have released the 4x4x6 cuboid in 2012, and then, come up with the 4x4x6 fisher cuboid 2015. These two puzzles are those of the best selling puzzles. In the Feb 2018, we then released the 4x4x5 Cuboid (center-shifted) based on the design of previous 4x4x6 cuboid. To complete the series, we have now the brand new 4x4x5 Fisher Cuboid (center-shifted).

Calvin's 4x4x5 Fisher Cuboid is a brand new design which is based on the design of 4x4x6 fisher cuboid, eliminated the top layer and so we have this puzzle. Since the center is shifted, we can create quite a few interesting shapes during the turning, like rocket and robots.
The quality of this puzzle is as good as the 4x4x6 fisher cuboid. It do turns smooth. You have to retain the plastic color as original stage to solve it.

You won't regret to try and play them on hand. We shall have black, white and limited blue versions.