Mogami-Kiyodaira Tsukabuto-gata柄太型 (Male 39)

Doubari-Tukabuto (thicker grip) 
Premium Taiwanese bamboo

The feature is that, when you need to rotate the blade side of the shinai (for exmaple: ojiwaza), it feels more flexible and easier than the standard model.

Shinai with a thicker grip are called "thick-handled"(Tsukabuto-gata/柄太型) bamboo swords and are extremely suitable for people with big hands or strong grip strength