Bolt series started with the intention of transforming the full threaded bolt, an industrial material, into a kind of sculpture through our interpretation. Our work has evolved from simply combining bolts and nuts, and has become a process of creating a balanced structure and aesthetics of objects using full threaded bolts, an industrial material. Since starting the bolt series, we have tried various ways to enhance the quality of crafts with full threaded bolts used as industrial materials. After a series of trials, the latest series was born, which is a sturdy furniture or object made only of threaded bolts and nuts. In our recent work, we are making additional attempts to deliver higher usability and aesthetic value.