The Mahlkönig 701798 grind size adjustment knob is a must-have for commercial kitchens and coffee shops using EK43, EK43 S, or EKK43 Allround grinders (pre-serial 549819). This replacement part features an enlarged inner diameter that ensures a snug, secure fit over the adjustment shaft, preventing misalignment and restoring optimal grind control. Whether you're running a high-volume café or a professional restaurant, maintaining your grinder's performance is critical for consistent coffee extraction and customer satisfaction. This knob is designed specifically for older units, addressing common issues like wear or improper seating that can degrade grind quality over time. By upgrading to this OEM-recommended component, you’ll experience smoother operation, longer equipment lifespan, and the precision your business demands—without the need for costly repairs or replacements.