These quality 4-piece grinders feature Kannastör's unique tooth design set into a clear top. This extra visibility helps to prevent over shredding while creating a superior, fluffy grind with fewer twists of your wrist. Compact and efficient, these have been a favourite of discerning smokers for years! Grinder Features: Size: 2.2" Clear jar body allows you to see what's left Easy Clean Screen Knurled Grips Made from 61/60 Anodized Food Grade Aluminum Limited Lifetime Warranty How it Works: Put your favourite herb inside and turn the lid. Herb will grind and fall through and catch in the middle compartment. The screened bottom allows that fine pollen and kief to fall through!