Using these action figures is a breeze. First, you can pose Kamen Rider Revi and Kamen Rider Vice separately however you like. If you want to form Revice Rex, just combine the figures following the natural way their parts fit together. The Ohin Buster 50 can be switched between Gun and Axe Modes easily. When using the replacement hands, gently remove the existing hands and attach the new ones. As for the additional transformation parts, you can add them to enhance the look of the figures. When it comes to maintenance, keep the figures away from direct sunlight to prevent color fading. Avoid getting them wet to prevent damage to the paint. If they get dirty, you can use a soft, dry cloth to gently wipe them clean. Also, be careful when handling the small parts like the replacement hands to avoid losing them.