The petrification device is a small, metallic object with a smooth surface, shaped like a trefoil knot, measuring approximately 6cm wide. It features intricate etchings and a thin thread for easy recovery. Following the moon event, Senku housed it in a container strapped to his lab coat. He two eyes and a cross-shaped mouth drawn on it and a rope given to it by Suika symbolizing its connection to Ishigami Village.