... saw, step drill and rail cutter are our main products.Our products are Top quality in China which can be used all ... , Euroboor, BDS, Ruko.4. Made of high-performance high speed steel., e.g. M2, M2AL, M35, M42 etc. And can be ... annular cutters production.Product applicationOur product is mainly used to steel structure project, rail way traffic, bridging, shipbuilding, machine manufacture and so ...