Seaming two surfaces is important to make the seams nearly invisible. ZUOS seamless seam tool can assist you in getting the job done right, fast and elegantly. This manual seam setters performing to make leveled surfaces with smooth joints. Perfect for marble and granite, flooring mirrors, glass, plastic, or any situation in which flat, non-porous surfaces need to be pulled together. Large 8” thumb-pumped vacuum cups with quick vacuum-release buttons Long-lasting anodized billet aluminum and stainless steel components Consistently create high-quality, expertly aligned perpendicular seams Counter-pressure leveler overcomes lower outswing of vertical pieces Seams easily open and close by use of smooth-turning knurled roller Ideal for mitered aprons, butt-joints, compound corners, and inside corners Easy to read indicators to monitor vacuum pressure at a glance The one pole design is much lighter and easier to deal with glue cleaning