Comprehensive Tool Selection: The set features 4 brush models (B1-4, B1-5, C1-6, C1-8) and 13 guides (12B to 30C), plus 5 separators (2 B grade, 3 C grade), catering to a wide range of machining needs. Versatile Engineering Applications: Specifically designed for keyway cutting in machine processing holes, it's also for stamping, machining accessories, and finishing parts of stamping machines, as well as edge trimming and groove processing in various projects. Service: We are very sorry for the shopping experience you have experienced. If you have any problems with the goods you received, please contact us and we will serve you 24 hours a day.. Premium Packaging and Components: Each brush set comes in a high-quality varnish box, including precision broaches, slotted bushings, and essential gaskets. for machinery manufacturing and parts production, facilitating edge grinding and groove processing with ease. Efficiency in Mechanical Work: Designed for sharp cutting and high efficiency, this tool set enhances mechanical tasks. It's particularly effective for creating keyways when used manually with an axle press.