|This article is about a/an transformation device in Kamen Rider Blade.|
- "Open Up!"
- ―Transformation announcement[src]
The Transformation Belt Leangle Buckle (変身ベルト レンゲルバックル Henshin Beruto Rengeru Bakaru) is a transformation device that Mutsuki Kamijo uses to become Kamen Rider Leangle. It was the second Rider System produced by Isaka/Peacock Undead with the aid of the B.O.A.R.D. scientists under his control (Chief Kei Karasuma among them). Its designed specifically for compatibility with the ♣A: "Change Spider" Rouse Card. This Rider System model utilizes the "Open Up" mechanism, to scan the Category-Ace Rouse Card; producing a transformation screen that attracts to the Rider (as opposed to the earlier systems which produced stationary screens). Coincidentally, the transformation screen itself can act as a deflective wall against assaults.