Four Piece Stainless Steel Grinder 2.5"

Now: $169.99
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The Party Size version of our already proven 1.75" Grinder!

Our 4-Piece 2.5” Stainless Steel grinder is another favorite among our customers! After receiving so many positive reviews and experiences from our already proven 1.75” grinder, we wanted to create a larger version with the same quality and performance. It is fully constructed out of 100% food-grade stainless steel, guaranteed to perform and last a lifetime. The weight and feel of this grinder is durable while only a few turns achieve the perfect consistent grind. Sharp teeth will cut and grind your material with ease minus excessive wrist strain. This durable and sleek grinder is perfect for larger dosing and makes a positive impression on friends during a group sesh! Best Part? You can load more material into the grinding chamber!

What is a sifter screen and how does it work?


Our 4-Piece grinder features a sift screen and collection chamber on the bottom to collect those potent trichomes that fall off during the grinding process. We use ultra fine stainless steel mess to allow trichomes to pass through, while it filters out unwanted leaf or plant material. 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 grinded flower. Elevate your experience by upgrading your grinder to a 4-Piece! 


  • 2.5” in diameter
  • Constructed out of 100% Medical Grade Stainless Steel
  • Sharp diamond-shaped teeth and deep cutting area
  • Smooth & Seamless grinding experience 
  • Knurled lid and bottom for exceptional grip and comfort 
  • Removable Stainless Steel Sift Screens (available in fine and medium micron)
  • Heavy Duty Magnetic Lid
  • Sleek Stainless Steel Finish 
  • Specially-designed curved bottom chamber for easy gathering of material or kief
  • Dishwasher Safe + Easy to clean
  • Gift Packaging Available- Comes packaged in a Vermont-Made novelty wood puzzle box
  • Limited Lifetime Warranty
  • 100% Money Back Guarantee



40 Reviews

  • 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.

  • 5

    Published by Duane Sprague on Nov 21st 2021

    Very happy, best grind, going to last forever

  • 5
    4 Piece stainless steel grinder 2.5"

    Published by Ned on Sep 1st 2021

    This is a superb grinder that goes way beyond simply excellent function. It is a work of machinist's art. Quality, function, fit, and finish are all truly phenomenal. The only thing I can imagine to improve it would be to make one out of titanium, which I would definitely buy. I cannot recommend this grinder highly enough.

  • 5
    Today I received my grinder, it is unlike any other grinder I have had till now. It is very easy to operate and works smoothly. I no longer need to use any power. I also would like to thank the Iaso team and especially Jamie for their endless pati

    Published by Diana on Aug 10th 2021

  • 5

    Published by Streetlife on Jun 17th 2021

    The quality and craftsmanship of this grinder is impeccable. Iaso is an amazing and professional small business that I'm very satisfied with.

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