Upgrade 2 Pack Seamless Seam Setter with 6 inch Vacuum Suction Cups, Granite Seam Setter for Countertop Joining & Leveling, Seam Joiner for Tile, Stone （With Replacement Air Pump+Torpedo Level）

These were great. I used them to splice kitchen countertop sections together. You have to make sure the countertop and the suction cups are clean to maintain the suction, but if you do the suction stays indefinitely. The job would have been easier if I'd bought anther pair though.

Used this to install countertop. Worked perfectly

The whole thing is good, and the weight is imagined.

I know people who’ve set granite seams by hand and I was thinking about saving some money and doing the same. So happy I decided to spend an extra bit of money and use this tool.Easy to use and the suction was incredibly strong. Leveling knobs did their jobs and could be adjusted very precisely.Made setting the seams so easy and the results were so much better than I could have done on my own.10/10

My husband was able to lift and center our quartz countertop using these...perfect!

Es justo lo que esperaba,No me arrepiento de la compra,

Pros:SecureJoinerLevelerSuctionProfessionalFine Tunable AdjustmentHeavy DutyStrong SuctionSolid StructureCons:NoneWhat I received in the package:2 x LONSGE Seamless Seam Setter4 x Hex Wrench2 x Open Wrench2 x Anti-Static Dust Cloth4 x Protective Cup CoverThis LONSGE Seamless Seam Setter product comes in a 2-pack.The tool itself appears to be well made. This type of tool is specifically for stone countertops that are not porous. These are able to assist in pulling the countertops together and set the seams while the adhesive set and cures. The tool has two suction cups per tool. They are vacuum sealed to the surface of the countertop as long as it is able to seal to the top. The suction cups are 6” in diameter and secure with a thumb pump.This tool also allows you to level the seams before the glue sets. So you can make a fine tuned, flush seam. In testing, these worked flawlessly. These could technically be used to join any surface (floors, glass, tiles) as long as it has enough surface area and it is able to secure a vacuum seal so it could be used properly.I tested this seam setting on granite, wood, flooring & glass. It worked equally well on all surfaces as long as it is sealed and smooth enough for the suction to grab and hold.I did a test on our wood island in the kitchen and it had excellent holding power. I used a force gauge and pulled up to 275 ft lbs of pressure against the suction cups and they held with no issue. You are not going to need that kind of hold to set seams but it is nice to know it has the ability.One note, there are no instructions and the item description states there is an air release knob. That is not the case. It took me awhile to figure out how to release the pressure and it is not some button release. You simply push on the raised edge on the outside of the suction cup and it quickly released the vacuum. It is simple but effective.I appreciate you taking the time to read this. All in all, these appear to be a quality product. The structure is strong and heavy and should serve you well for a long time. I would definitely recommend working with these before you actually set any adhesive. So you know how to adjust them and verify that the suction cups work as expected. As you would not want to have a critical failure when your glue is curing. Hope this information was helpful. [5 Stars]