C20F118 boring head set includes a metric F118 head, C20 shank, and 12 cutters (18 mm width). It is designed for precise internal diameter adjustments on horizontal boring machines and CNC milling setups. Material and durability: made from 40Cr alloy steel to provide consistent performance under light to medium cutting loads. Suitable for metal fabrication, shops, and general machining operations. Precision and control: features a fine adjustment scale with 0.01 inches increments, enabling accurate bore sizing and tight tolerance control for coordinate and CNC milling applications. Complete tool set: includes three wrenches for cutter replacement and tool setup, streamlining changeovers during production or maintenance tasks on milling and boring equipment. Compatibility and sizing: uses a C20 shank and comes with 12 cutters, each 18 mm wide, designed for precise internal boring work. Practical use scenarios: 1) Finishing internal diameters of bushings, sleeves, or tool housings on horizontal boring machines. 2) Precision internal bore sizing in CNC milling setups for components requiring tight tolerances (bearings, hydraulic ports, shafts). 3) and refurbishment tasks in metal fabrication shops to restore worn bore diameters with consistent results across multiple parts. Benefits: Enables accurate 0.01 inch bore sizing for reliable results Robust 40Cr alloy steel construction supports reliable performance in light to medium cuts Quick and convenient setup with three included wrenches Compatible with horizontal boring machines and CNC milling configurations