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GRABO 90 Degree Stone Seam Setter

(7 customer reviews)

GRABO 90 Degree Stone Seam Setters are professional seam setters which work on porous and non-porous surfaces for joining seams. Designed to make two workpieces to be a 90 degree angle for various material such as Granite, Stone, Marble or other similar stone material and it is widely used for kitchen island and bar counters.

  • Achieve straight seams for professional countertop installers
  • Fine-tuned adjustable knobs for precise levelling
  • Fine-tuned adjustable knobs for seam joining or opening
  • Made with long-lasting stainless steel components and tightening handles for heavy-duty stone tops
  • Attaches to all GRABO models
The product includes the 90 degree rails, two base plates, and the bag of hardware. Inside the bag of hardware, it should include:
  • Two large (8mm Allen) bolts to connect the rail to the base plates
  • 6 smaller (3/16th) bolts that connect the base plates to the GRABOs.
  • And 6 washers and lock washers.


In stock


SKU: SST-1-1 Category: GTIN: 840082400851
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Installing two surfaces together is important to make the seams consistent. The GRABO 90 Degree Stone Seam Setter can assist you in getting the job done right, fast and with ease. This seam setters performing to make levelled surfaces with smooth joints. Perfect for marble and granite, glass, plastic, or any situation in which porous and non-porous surfaces need to be pulled together. Made with aluminium and stainless steel components. Consistently create high-quality, expertly aligned perpendicular seams.

Additional information

Weight 10 lbs

7 reviews for GRABO 90 Degree Stone Seam Setter

  1. Michael Tony

    This seam setter made installing my granite countertops so much easier! The quality is excellent and it is built to last. I couldn’t be happier with my purchase.

  2. Thomas Jane

    The GRABO 90 Degree Stone Seam Setter is a must-have for any stone countertop installation. It made my work look professional and I’m extremely satisfied with the results.

  3. Tom Yando

    This seam setter has made my granite installation process so much smoother. It’s easy to use and I’m extremely happy with the precision of the tool.

  4. Yaki Sarah

    I’m impressed with the precision of the GRABO 90 Degree Stone Seam Setter. My countertops look flawless thanks to this tool. I would highly recommend it to anyone working with stone countertops.

  5. Brandon David

    The GRABO 90 Degree Stone Seam Setter is an essential tool for any stone countertop project. It’s so easy to use and the results are always perfect. I’m glad I purchased this product.

  6. John Lucas

    I highly recommend this seam setter for anyone working with stone countertops. It’s durable, produces great results, and has made my job so much easier.

  7. Lisa Hon

    The GRABO 90 Degree Stone Seam Setter is a game changer! I was able to achieve perfect 90 degree angles every time on my kitchen counters. I highly recommend this tool to anyone in the business.

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Real makers and industry professionals love GRABO. Watch Izzy Swan's first reaction to GRABO, his great demonstrations and creative custom made add-ons. 

Seamlessly pick up and move even the largest of flooring installations, piece by piece. Delicately move fragile tiles and landscaping from one room to another. 


It's important for us to provide you with honest verified reviews from real professionals. Click the review to see it's source and read more verified testimonials from Amazon, FB professional groups and more sources.  

  1. Rebecca P

    Used this product to help carry HVAC units while putting them in attics and loading them to and from the trailers. The unit gets to suction quickly and the electric pump feature makes it so easy for one handed operation. So far it has held on while carrying a few hundred pound unit with ease. Definitely recommend it

    Review source: Amazon

  2. Don B.

    Using this on the job site to move granite slabs for install of kitchen. Project manager showed up and was super impressed. This item can save a lot of broken toes

    Review source: Amazon

  3. Joe B

    I have a bluestone patio set in stone dust that time to time needs to be reset due to settling. It is a snap to pick up a piece of bluestone with one of these. They never failed. I ordered a second one because I have a few very large bluestones that make it too hard to lift with just one.

    Review source: Amazon

  4. David Y

    GRABO Seam Setter is a must-have for any professional stone worker. 5 stars, highly recommend.

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