KOSTER is a leading manufacturer of hardware products like castes and steel files.

Shanghai Craftro Tech Co., Ltd. is a?professional manufacturer specializing in the R&D and production of precision grinding systems, including desktop grinding machines, portable micromotors, handpieces, and a?full range of grinding and polishing burs. Founded in 2017 and located in Jinshan District, Shanghai, we are recognized as a?National High-Tech Enterprise, supported by strong in-house R&D capabilities and a?modern 9, 000 m2 manufacturing facility. Our production operates under strict quality management systems, with ISO9001, ISO13485, and MDSAP certifications, ensuring stable performance, high precision, and compliance with international standards.