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As a leading manufacturer specialized in drill parts & construction accessories, J.B Machinery are dedicated to provide one-stop cost-effective components solution for clients in construction world. Consisting of our own casting, forging & machining factories, J.B has a complete& modernized quality control system on the whole supply chain. Our drill products and construction components are specifically designed for customers` needs and include a wide variety of sizes and designs... J.B Machinery (Ningbo) Co., Ltd. have been specialized in Drill Bits manufacture for many years.Our main products are various kinds of Self Drilling Anchor,Scaffolding Parts.Also including Formwork Accessories,etc.