- Diamond Hex 4 part grinder. Introducing the first thread-less style grinder with a unique magnet/peg design. The top lid will spin and grind your material while the remaining 3 parts of the grinders stay securely fastened together with 3 magnets and 3 pegs. These are heavy duty CNC machined anodized grinders. The hex grinders are easy to turn because there are no threads. No more cross-threading with this new design.
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