Cole & Mason Aldburgh Classic Mill SetFeatures & Benefits Contemporary, twisted hexagon shaped acrylic mill set that will look great on the table top or kitchen surface Dual sharp ceramic mechanisms for efficient grinding of both salt and pepper Compact and sturdy 140mm mill set Twist knob to tighten or loosen mech for a finer or coarser grind. The efficient ceramic mechanism is covered by a 10 year guarantee Simply unscrew the knob and remove the top to refill Adjust the grind by