This small 4pc Shredder Grinder by Roos is a great looking and well-designed grinders that do an equal job grinding your herb as a larger 4pc grinder does. But here you got the advantage of being able to put it in your pocket and bring it with you on the go. It is made out of high-grade aluminum and there are 2 levels were you grind you herb between and then you have one for storing the herb and another one to collect the keif.