Three Piece Stainless Steel Grinder 2.5"

Now: $139.99
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* Important: Please order by Monday, December 5 for guaranteed Christmas delivery!



  • Our biggest 3 chamber herb grinder, perfect for large doses and enjoying with friends
  • Constructed out of 100% Medical Grade Stainless Steel 
  • High quality 3 piece herb grinder made in the USA
  • Strong magnetic lid keeps the top and bottom piece securely attached
  • Sharp teeth for an easy and smooth grinding experience
  • Knurled top and bottom piece for exceptional grip and comfort 
  • Specially-designed curved bottom chamber for easy gathering of herb and kief
  • Dishwasher safe and easy to clean and maintain 
  • 100% Money Back Guarantee and Limited Lifetime Warranty
  • FREE SHIPPING | Ships in 3-5 business days

Pro Tip: Add gift packaging for a Vermont-Made novelty wood puzzle box that perfectly complements this large grinder for herb

What’s Included:

  • One (1) large 3 piece herb grinder 


Our 3-Piece 2.5” Stainless Steel grinder is a favorite among our customers! After receiving so many positive reviews and experiences from our already proven 1.75” mini herb grinder, we wanted to create a larger version with the same quality and performance. This durable and sleek 3 part grinder is perfect for larger dosing and makes a positive impression on friends during a group sesh! Best Part? You can load more herb into the grinding chamber! 

The weight and feel of this big herb grinder is durable and heavy duty. Unlike aluminum grinders, it is constructed of 100% medical grade stainless steel, making it ideal for medical patients and anyone who has health concerns using aluminum products.  

This large grinder is built with the same design methods and technology used in aerospace and renewable energy fields. It is high quality, guaranteed to perform and last a lifetime.

This 3 piece grinder features our Patent Pending labyrinth seal design. With our exclusive labyrinth seal solution, the top and middle pieces of the grinder are specially sealed together so your herb stays securely inside – no spills and no lost herb to worry about.

Create the perfect grind with just a few turns of the grinder. Sharp diamond-shaped teeth will cut and grind your herb with ease, and knurled top and bottom pieces save you from excessive wrist strain. Removable stainless steel sift screens allow you to choose between fine and medium micron sizes. 

This large herb grinder is truly a game changer. Easily enjoy your herbal medicine anywhere, anytime. Get the best stainless steel 3 piece herb grinder on the market today.


  • Material: 100% Medical Grade Stainless Steel
  • Width: 2.5 (in)
  • Height: 1.8 (in)
  • Depth: 2.5 (in)

► For a smaller 3-Piece Grinder, order our 3 Piece Stainless Steel Grinder 1.75"

► For a large grinder with a kief catcher, order our 4 Piece Stainless Steel Grinder 2.5”

► Add smoking accessories like a stainless steel storage container or a stainless steel chillum

If you have any questions or need any help, please visit our contact us page.



19 Reviews

  • 5
    2.5inch grinder

    Published by Michael on Dec 16th 2020

    Very good, nicely machined. The double walled rim is a good idea.

  • 5

    Published by William Jimenez on Nov 29th 2020

    ¡Superb! The best Ive tried

  • 5

    Published by Fred on Nov 6th 2020

    As a machinist I love this thing. Every edge is perfectly broken, the surface finish is great when you hold it, and when surfaces contact each other they glide. The fillet on the catch piece fits my finger perfectly when I scoop out a pinch, and the multi-start threads make it so it easily screws back together without cross threading, and with a single twist. The design of this grinder is excellent, and the execution is spot on. I don't know if the general public cares about all of this, but I wanted to make sure whoever is sitting in front of the lathe turning these out knows that their work is appreciated.

  • 5

    Published by Jennifer Bryden on Jul 4th 2020

    Solid grinder with magnet easy to use. Quite heavy.

  • 5
    Best grinder made

    Published by spkoller on May 17th 2020

    The iaso grinder is superior to inexpensive aluminum alloy grinders in every way, plus you can avoid breathing toxic aluminum particles and fumes that can cause serious health problems.

  • 2
    I kind of like it but they sent me a 4 piece

    Published by Ed on Mar 23rd 2020

    I ordered a 3 piece but received a 4 piece grinder. I contacted customer service but got no response. I kind of like this grinder and the build is heavy and durable but I wanted a three piece grinder like I had ordered. The gasket should be rubber instead of plastic which has worn out with minimal use and cleaning. 2 stars because I received the wrong product. Overall I like the functionality and want this, but the 3 piece version.

  • 5
    3 piece stainless grinder 2.5”

    Published by Bill Stashak on Feb 8th 2020

    Beautifully machined works like a gem.

  • 5
    Great Grinder

    Published by Matt on Jan 30th 2020

    Awesome grinder! Heavy duty but easy to handle. It’s solid, fit together nicely and includes a magnet in the middle for extra tightness. Couldn’t be happier with this and appreciated the hand written note that came with the delivery. Delivery was pretty fast as well.

  • 5
    Very satisfied

    Published by Matt C. on Oct 4th 2019

    The highest quality materials and machining easily make this the best grinder available today. The price point can feel a little off-putting at first, but once you hold the grinder in hand, it’s obvious that it features a design and build quality significantly better than any alternative.

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