2Pcs Granite Seam Setter, Adjustable Vacuum Suction Cup, Seamless Stone Seam Setter for Seam Joining and Leveling, Professional Countertop Installation Tool for Granite, Stone, Marble, Slab (2Pcs)

Worked Great for my granite install.

Muy buena herramienta

Not the strongest holding power but not them expensive ones either. Does ok but struggled with getting them to hold.

Excelente

Absolutely worthless. As others have said, as soon as you apply pressure with the adjusting screws it pops off the suction cups. I tried applying moisture to the cups, tried them dry, tried everything and they do not stay in place with the slightest amount of tensioning. Why make a product that doesn't work? I thought I would be able to make this work just once and for the cost it would be worth it, but it just doesn't work at all. This was used on a smooth granite surface. They do not work, don't waste your time.

Suction was good for the first few times after that there’s always one side that losses suction. Can definitely mess up a good seam.

Seam must be 100% level before using it.

The suctions were not reliable. I was able to get my counter in but it was mostly because I ended up shimming. The suctions worked here or there and only briefly, which was sometimes enough if you need to be able to rely on the suctions then these won't work for you. I guess you get what you pay for because some of these suction systems cost many times as much as this one. Everything else about these was fine.