the herb grinders are to break up ur weed or hash that way u don't have to break it up by hand, it's much faster and much easier. You just put your shit in the grinder and turn it back and forth until suitable for smoking. about the kief, You can find a kief box at your local headshop im sure. What it is is a wodden box with a special screen that u rub ur weed on or u just keep ur weed in it when ur not using it, but what happens is all the crystals fall down in the screen to the bottom where there will be a piece of glass or mirror and u just scrape it together put it on some weed or tobacco and toke it up...