Master Quality MADAKE Shinai - "ARIGA HAKKAKU" Size 39 is a OCTAGONAL, OVAL, KOTO GATA, TSUKATAN Shinai. Weight (Available in two different weights): Regular Adult Men: Approximately 460 - 480 g (510 - 530 g assembled)Light Weight (K-Model): Approximately 410 - 430 g (460 - 480 g assembled)Left Grip: 30 x 26 mm DiameterRight Grip: 32 x 29 mm DiameterTsuka: Top Quality GIN Leather Simple Traditional Tsuka for 37 Shinai (Approximate length: 30 cm). Exclusively Hand made for ARIGA BEKKAKU Shinais. "ARIGA HAKKAKU is an evolution from the ARIGA BESSAKU No22. It has the similar concepts of TSUKATAN (Short Grip), but in a Oval-Octagonal version. Because it has a short Tsuka, it is designed so that the knot of the bamboo is about 1 inch closer to your right hand, compared to regular Shinais. I always preferred shorter Tsukas, so I used to place Short Tsukas on a 39 Shinai, but that would leave a large gap between the end of the Tsuka and the Knot of the bamboo, which made the Shinai look unbalanced and tip heavy. By selecting a bamboo with the Knot (where the weight is concentrated) closer to your right hand, it provides the Dobari effect, by bringing the center of gravity close to the hands. Also, the Oval-Octagonal Tsuka adjusts better to the hand, with a more real-sword feel, when doing the kamae and Striking. Available in two different weight, Adult Men, Adult Women "K-Model". This is one of the best Shinai I have designed, and I just used at my last 8 Dan exam." (Taro Ariga, CEO E-BOGU.COM, Inc. Kendo Kyoshi 7 Dan)