T & G CrushGrind Oblique Beech, Black Satin or Walnut Wood Mills. Fully adjustable non-corrosive CrushGrind mechanism. Easy to fill design - no spindle. Super high and consistent yield. Harder and sharper than steel. Suitable for salt, pepper, whole dried herbs and spices. Easy to clean. Tested to the equivalent of 400 years normal domestic use. CrushGrind Lifetime Guarantee.