DAMO 6-inch Seam Setter for Seam Joining & Leveling / Professional Countertop Installation Achieve the finest seams for professional countertop installers; Two 6-inch hand pump vacuum suction cups for reliable hold; Two fine-tuned adjustable knobs for precise leveling; A fine-tuned adjustable knob for seam joining or opening; Made with long-lasting stainless steel components and aluminum tightening handles for heavy-duty stone tops.