The FS Cube Puzzle Box was distributed as a Christmas gift to 2024 Karakuri Members. The crafter describes the puzzle in the following manner, " This work was designed as a Christmas present for 2024. This work was designed primarily for storage size rather than for puzzle difficulty. The external appearance is the same as the original regression cube (KW-48) and FS Cube (KW-50), but the internal structure was newly designed. This allowed us to secure a huge storage space. The mechanism adopted in this work has been used in past works, and is likely to be further developed. . " The exterior of the puzzle measures approximately 65 x 65 x 65 mm. with a secret storage space of 46 x 34 x 34. Crafted in American Black Cherry and Magnolia. Will arrive in original gift box and opening diagram.