Four Piece Stainless Steel Grinder 2.5"

Now: $169.99
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  • Our biggest herb grinder, perfect for large doses and enjoying with friends
  • Constructed out of 100% Medical Grade Stainless Steel 
  • High quality 4 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 on orders $100+  | 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 herb grinder 
  • One (1) 40 micron medium sift screen
  • For the 60 micron fine sift screen, add a request to your order notes during the checkout process


Our 4-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 4 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 with a kief catcher 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 4 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.

This four piece grinder includes a kief catcher or pollen catcher that functions as a storage compartment for collecting kief.


A kief screen is a type of sift screen used to separate ground herbs from kief. An ultra fine stainless steel mesh screen allows the trichomes to pass through to the bottom chamber, while the bigger herb pieces remain in the catch chamber.

Our 4 piece grinder with a kief catcher features a sift screen and catch chamber on the bottom to collect those potent trichomes that fall off during the grinding process. The stainless steel sift screens are removable, allowing you to choose between fine and medium micron sizes. 

You can sprinkle these trichomes on top of a bowl, in a joint, or use it in cooking and baking your favorite meals and treats! 

The bottom chamber may double as a stash container for ready-to-go ground flower. Elevate your experience by upgrading to the best large 4 chamber grinder!


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

► For a smaller 4-Piece Grinder, order our 4 Piece Stainless Steel Grinder 1.75"

► For a large grinder without a kief catcher, order our 3 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.




54 Reviews

  • 5
    Functional and beautiful

    Published by Jeffrey on Aug 2nd 2022

    I think this is the best grinder ever made. This thing is an absolute work of art. I am obsessed with stainless steel so I bought one of the stainless storage containers, and a chillum too!

  • 5
    Love the grinder

    Published by Jesse on Jul 10th 2022

    It's so much heavier than aluminum grinders and it feels great. The teeth are really sharp, be careful lol. My favorite feature is the double walled connection on the top chamber and how the teeth actually have space in between them to allow for the bud to be placed in. Expensive but worth every penny.

  • 5

    Published by WILLIAM on Jul 3rd 2022

    This large grinder makes quick work of your herb. Top notch quality it is a solid build. I do however wish the catch bowl, below the grinder above the kief catcher, was just as deep as the small grinder. I love both grinder sizes, the small ones are perfect for my pipe to dip into for a bowl full. Thanks IASO

  • 5
    Great Grinder

    Published by Michael on Jun 30th 2022

    This is definitely the best grinder I’ve owned. It is heavy duty and grinds material to the perfect fineness. Very expensive, but I can’t find a better product.

  • 5
    Rolls-Royce of Grinders

    Published by Hector on Mar 23rd 2022

    By far the best grinder to date, I got this one because it's made from stainless steel, and not aluminum or copper. I also had Jamie and his team added custom logo on the top piece and it came out better than I imagined. I would highly recommend this product to my friends, and I have!

  • 5

    Published by Lynn on Jan 12th 2022

    For the connoisseur of fine grinders this one is an absolute must. The craftsmanship is superior to anything out there and as a result takes this beast to a level of artistic beauty. iaso, well done.

  • 5

    Published by Unknown on Jan 1st 2022

    Well worth the price. Very high build quality, works amazing, and will last a lifetime!

  • 5
    Simply an awesome piece!!

    Published by Devin on Dec 28th 2021

    This is an amazing machined piece for your flower! It has a clean finish, good heft, and functions super smooth.

  • 5
    Great grinder

    Published by Alan on Dec 23rd 2021

    I bought this grinder because it’s stainless steel. Easiest to clean. Easiest to grind without covers sticking . I like the fact that it’s not aluminum and I’m hoping safer to use. The grinder is beautifully designed and after a few months we of use , I still am Impressed. I have 3 other grinders that received top ratings at the usual review sites and I’m surprised that this model is so much better than the others I have used.

  • 5
    Cool grinder

    Published by Jacoby on Dec 18th 2021

    Very heavy and high quality feel and fit. Excellent grind size that works well with the volcano and for rolling. I love not worrying about aluminum in my flower.

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