The worker is designed to be able to work promptly efficiently safely, and to demonstrate the best performance by the combination of "Sharp rance" and "Starcattend", our rance holder is produced. The SFH type is a high performance rance holder designed to build special reverse-Toben into, and to prevent the melt from flowing backward surely. Because the rance holder made of industry of the oxygen arc can use several kinds of rance together by exchanging the head and Pakkin, it is possible to use it efficiently.