Four Piece Stainless Steel Grinder 1.75"

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The World's First Stainless Steel No-Bind Grinder 

Our best-selling Four-Piece Stainless Steel grinder was developed specifically for medical patients who have health concerns using aluminum products as well as trouble with grinders binding up. This mini but mighty grinder features our Patent Pending labyrinth seal design, and utilizes design methods and technology used across aerospace and renewable energy technologies. It is fully constructed out of 100% food-grade stainless steel, and guaranteed to perform and last a lifetime. The weight and feel of this grinder is durable. Only a few turns will create the perfect consistent grind without binding up. Sharp diamond-shaped teeth will cut and grind your material with ease minus the excessive wrist strain. Our 1.75” grinder is ideal for those who enjoy smaller doses, plus the convenience of taking your medicine on the go! This grinder is truly a game changer for those who want to enjoy an elevated grinding experience.  

What is a Kief Catcher and how does it work?

Our 4-Piece grinder features a screen and a kief catcher chamber on the bottom. The mesh screen (available in fine and medium micron) gathers all the potent kief (trichomes) that were knocked off the buds during the grinding process. Kief will start to accumulate in our specially-designed bottom chamber after your first use. The smooth curved walls inside the catcher chamber makes it easy to gather kief. You can sprinkle kief on top of a bowl, in a joint, or use it in cooking and baking your favorite meals and treats! As an added bonus, the kief chamber may double as a stash container for ready-to-go grinded flower. Elevate your experience by upgrading your grinder to a 4-Piece!


  • 1.75” in diameter - the perfect travel-size!
  • Constructed out of 100% Medical Grade Stainless Steel
  • Sharp diamond-shaped teeth and deep cutting area
  • Smooth & seamless grinding experience 
  • Knurled lid for exceptional grip and comfort 
  • Removable Stainless Steel Kief Catcher Screens (available in fine and medium micron)
  • Heavy Duty Magnetic Lid
  • Sleek Stainless Steel Finish 
  • Specially-designed curved bottom chamber for easy material/kief gathering
  • Dishwasher Safe + Easy to clean
  • Comes packaged in a novelty wood puzzle box
  • Limited Lifetime Warranty
  • 100% Money Back Guarantee

► Looking for a larger grinder with a deeper grinding chamber? Consider our Four Piece Stainless Steel Grinder 2.5" !

***Please Note: For custom engraved grinders, please select "custom engraving" and upload a high-resolution vector image of your logo or design. Custom engraved grinders have an additional 1 - 2 week lead time.

1.75 (in)
1.50 (in)
1.75 (in)

27 Reviews

  • 5
    Best Grinder, Ever!

    Published by Susan Coté on Aug 31st 2021

    I absolutely adore how fluid this grinder's action is. It gives me the prefect grind with minimal effort, it's a great size, and it just feels so study and solid in my hands, which I absolutely love.

  • 5

    Published by Great Product! on Jun 28th 2021

    really nice stainless steel grinder! highly recommend.

  • 5

    Published by Tony on Jun 9th 2021

    Great design, materials and craftsmanship. Works great. You get what you pay for.

  • 5
    Unbelievable quality

    Published by Dr. H on Apr 30th 2021

    I am so happy I stumbled across this grinder. It is top quality, so much so that I just bought one for a friend. Keep up the great work

  • 5
    Extra Satisfied

    Published by Trevor Allen on Feb 20th 2021

    Top to bottom, I've been blown away by IASO. Unreal customer service and swoon over this grinder. It's extra satisfying to use—buttery smooth, gliding with precision. There are a few qualms about how small this is—I think it's the perfect size, for so many reasons: it grinds the perfect amount for a single session (it feels like you are brewing some sort of artisanal small lot pourover); it stores easily, almost anywhere; the machining, weight and size make it feel like some sort of sexy spy gadget (people will ask me what it is whilst I'm milling with it). Point is, this thing is far superior to any grinder I've ever used. I highly recommend it. If you want a bigger grinder, get their bigger grinder. You'll never think about the price tag again—you'll be too distracted by how enjoyable it is to use.

  • 5
    Iaso Small Grinder

    Published by Hilary on Jan 13th 2021

    This grinder far exceeded my expectations. I was looking for a small, high quality grinder and I found this one mentioned in a “top 10 of grinders” on the web. I thought I’d give it a try and I’m not disappointed. It had the look and feel of exceptional quality, it grinds like a dream, effortlessly. The small touches like the angled storage section and the curved crystal catcher make it unique. It’s perfect for my handbag or pocket although it’s fairly weighty but that adds to its beauty. I don’t often write reviews but I am so pleased with it I thought I’d share my findings. I am in the U.K. and it came reasonably quickly considering it was coming up to Christmas and during the Covid lockdown.

  • 5
    Quality Product

    Published by J Reed on Jan 13th 2021

    Yes it’s expensive, but seriously good investment! When you hold the product, the price makes sense, exceptionally well made and performs flawlessly. Plus you’re only gonna need to buy it once as it will last a lifetime. Have recommended to all my friends.

  • 5

    Published by Matija on Jan 12th 2021

    The product is top quality ... I will definitely contact you again

  • 4
    This one works fantastic. I meant to get the wider one, but this one works absolutely great.

    Published by Na'eem on Jan 10th 2021

    Hope you guys get many blessings coming your way.

  • 3

    Published by Anne on Dec 16th 2020

    I love what it does but it is so small you have to re load it to many times and the lid is so thin I can't grip it to use it. It hurts to use it. You need to make it easier for old people with arthritis to turn the lid.

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