At 100mm, this premium grinder holds a good amount of dry herbs and the strong metal holds it all into place. Crafted from the finest aluminum, the 4pc Got Vape Aluminum Grinder 100mm is strong enough to last through the wear and tear. The teeth grinds up dry herb easily regardless if its sticky or not. With magnetic metal top this grinder makes sure that no dry herb is wasted, eliminating any spills. If you are looking for a durable and convenient grinder, the 4pc Got Vape Aluminum Grinder 100mm is the right piece for you.