Kannastor's V2 Series of GR8TR Grinders are some of the best on the market. The company is so confident in their product that it comes with a lifetime warranty. These grinders are thoughtfully designed with modular components so you can take pieces out for compact travel or add more when desired. Switch between a fine grind for vapes or a standard medium grind for smoking. All the pieces are threaded so you can simply unscrew any piece that you don't want to use. Multiple colors available.