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



44 Reviews

  • 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.

  • 5
    Four piece steel grinder

    Published by Robb on May 26th 2021

    Most amazing grinder I’ve ever had, it’s heavy and sturdy. I will say that I wish the middle holding have was vertically deeper so I can fit more in it at a time. I feel like I won’t need a new grinder for a long long time and that makes me happy. Good job team.

  • 5

    Published by Kyleah on May 22nd 2021

    Perfect! It's not only beautiful with the custom engraving but also works like a dream!

  • 5

    Published by Derek Gagne on Feb 18th 2021

    freaking awesome. Every grinder should be steel and made with thick threads like this thing!! Ill be passing this along to my grand kids in 50 years.

  • 5

    Published by Liam Hirst on Jan 21st 2021

    Best feel a grinder’s ever had. My weed tastes so much better with a much more consistent grind. I only wish it had the logo like the one in the YouTube video

  • 5
    Best grinder out there!

    Published by Tim on Jan 14th 2021

    Love these grinders so much I bought a second one. Nothing wrong with the first one; after a year of daily use it still grinds sharp as ever and never binds!

  • 5

    Published by Kevin on Jan 1st 2021

    really good, smooth action & solid construction. Heavy in the best way. Classy design. Great value

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