CAMTOA 4 Part Metal Herb Weed Tobacco Grinder Pollinator Cigarette Crusher Spice 40mm Material: Zinc Alloy Color: black, silver, gray, red, blue Use in triturating tobacco, herb, spices and so on. Inside has a magnet, prevent from breaking away from your hand. Easy to use, put tobacco into it, close the lid, rotate, a few times then to be OK.