|This article is about a/an transformation device in Kamen Rider V3.|
The Transformation Belt Double Typhoon (変身ベルト ダブルタイフーン Henshin Beruto Daburu Taifūn) is Kamen Rider V3's first and foremost weapon. Shiro Kazami transforms into V3 by performing the "Henshin", a series of moves which activates the 2 revolving pistons of the Double Typhoon, and then converts the accumulated wind energy to transform Kazami into Kamen Rider V3. Kamen Rider V3 is powered by the energies of the right "Kamen Rider No.1 Typhoon" and the left "Kamen Rider No.2 Typhoon". This allows V3 to utilize both the "Skill" of No.1 and the "Strength" of No.2. It is thinkable that like V3 who is sometimes considered a modified version of his predecessors, the Double Typhoon is considered the same to the original Typhoons.