The core activity of RTK Kneubühler encompasses two main areas:
1. **Blacksmithing and Metal Processing**: The company offers blacksmithing services, welding, repairs, and the manufacture of metal products such as railings, handrails, garden gates, and other customer-specific metal parts.
2. **Sales and Repair of Sealing Machines and Cutting Tools**: RTK Kneubühler sells and repairs sealing machines for the gastronomy sector as well as cutting tools like table knives, sharpening steels, kitchen knives for meat, and others. The company also provides grinding and sharpening services for these tools.