Gold-plated high-tension (torcia) bolts (for roofing ceremony) Silver-plated high-tension (torcia) bolts (for ridge construction) Production of plated spanners Production of plating hammer Making cosmetic boxes (paulownia boxes, acrylic cases) *You can also engrave your name on the box. What is the construction ceremony? It is a ritual performed when a new building is built, and is also called ridge-age, tatemae, or kenbu. This is done to pray for the safety of the building even after completion, and is usually done when the ridgepoles are raised after the basic structure such as pillars, ridges and beams is completed. Even in the case of steel-framed or reinforced concrete buildings, it may be done when the main structure is completed. Since bolts are used to join multiple materials together, they are popular as lucky charms when praying for long-lasting bonds such as weddings, opening ceremonies, and organization ceremonies.