Check the listing for details. FLYNN BORING HEAD #45. Condition: Used. Listed at 225.00 USD. The Flynn Boring Head #45 is a specialized tool used in CNC machining and metalworking to create precise and accurate holes. This particular boring head is designed to be used with a CNC machine to perform boring tasks with ease and efficiency. The #45 designation likely indicates the specific size and configuration of the boring head, making it compatible with various machines and workpieces. With the Flynn Boring Head, users can expect high-quality results and improved productivity in their machining processes.