Tab rotates to adjust Grinder setting from fine to coarse Non-corrosive ceramic grinders won't absorb flavours or odours Grinders rest flat when upside down for easy refilling Soft, comfortable, non-slip turning knob Grinder set is sold filled with sea salt and black peppercorns The OXO Better Guarantee: If you experience an issue with your OXO product, get in touch with us for a repair or replacement. We’re grateful for the opportunity to learn from your experience, and we’ll make it better.