These are the extra large herb grinders that, in our opinion, are the best value, but they are also quite expensive. We sell them far below the MSRP, just so more customers can enjoy them, but these herb grinders also aren't for everyone. We like them becuase they can get any size job done more easily, but, since these 4" grinders are a bit bulky, they're not easy to travel with, and certainly don't fit into a pocket.
Either way, this is a true TrueBlendz grinder, and operates as effectively and efficiently as their other smaller grinders. This one stays sharp; we've had ours for over 2 years now, and it works as effectively as it did on the first day we bought it. Grinders may seem to come in all sizes, and some sizes may seem close to another size, but even 1/2" on a grinder can make a big difference. These 4" grinders are for the heftiest of herbal grinding jobs!