The T7 is MagicYoYo's quality, budget responsive yo-yo in a butterfly configuration. The white hub nub coverings can be removed so you can install hub stacks such as those found on YoYoFactory-equipped yo-yos. This model came out in Spring 2021.
From the Spingear.jp: "Full metal toy style yo-yo from MagicYoYo.
It's a lightweight and narrow style yo-yo that's different from most full metal yo-yos.
It is a yo-yo that can be played easily with a strong sense of the pull-back yo-yo for carrying around that became popular around 2018, and has a low edge for a model of its kind.
There is a rubber capper attached to the center projection, but if you remove it, you can find a hub stack joint, and a 105 bearing-type hub stack (the type used by the YoYoFactory) can be attached. (Hubstack is not included.)