Using these upgrade parts is easy. First, take your SH Figuarts Son Goku GT figure. You can swap out the existing parts with the new ones. For the hair pieces, gently place them on the head. To change the facial expressions, carefully remove the old face and put in the new one. Attach the hand parts to the arms. As for the tail, insert it into the appropriate spot on the body. When handling these parts, be gentle to avoid any breakage. Keep them away from sharp objects and direct sunlight. If they get dirty, you can use a soft, dry cloth to clean them.