IMT 2 Pack Seamless Seam Setter with 4.5-Inch Vacuum Suction Cups for Seam Joining and Leveling, Professional Countertop Installation Tool for Granite, Stone, Marble, Slab, with Free Gloves and Case

The 2 pack Dual Hand Cup with ratchet for pulling and aligning of work-pieces in assembly work, design to pull two flat surfaces or seams together. 6” cups provide more power to handle heavy stone tops with ease. The working area is easily accessible while the seam setters are in place, so removal is not needed in order to apply epoxy or scrape the seam. The seam levelers slide on rails for custom placement on both sides of the seam and feature non-spinning feet to prevent scratching of surfaces. A red-line indicator on each cup alerts the user if re-pumping is needed (can re-pump without removing units or losing suction). Use alone or in pairs; best for non-porous materials.
Feature:

Vertical Maximum Suction: 220kg
Suction Cup Diameter: 4.5″
Application: Perfect for marble and granite, flooring, mirrors.
Weight : 2.5kg

Advantage:

New design patented product
Much lighter that is easy to carry and operate
One pole design that is easy to clean the seam glue
Free protective gloves, L shape internal hexagonal wrench and blades for glue cleaning
Durable protective carry case for easy storage
Pass SGS, RoHS, PAHS testing

How to use:

Place the fixed (left) suction cup on the left slab. Place the movable (right) suction cup on the right slab.
Pump the plunger until the suction cup attaches completely.
To join the seam, turn the side knob counter-clockwise until you are satisfied with a seamless appearance.
To level the slabs, make sure one of the head under the top knob is on the higher side of the seam and turn the top knob clockwise until the slabs are leveled. 
To Lift the rubber tab on the edge of the suction cup to release the suction after seam has been completed.

Best Gift for Family on Thanksgiving, Christmas, Black Friday, Cyber Monday