Wacky Willy’s Boomers Stainless Steel Weed Grinder is 100% 304L Stainless Steel. Solid medical grade construction means you will never worry about broken grinder teeth. Stainless Steel gives you a smooth grinding experience and is the safest for you and for your herb. It’s truly indestructible, so just enjoy the grind and put your mind at ease, this grinder will be the last one you’ll ever need. Use it for any type of tobacco, herb or botanical.