1、Stone splicing tensioner, symmetrical design, thicker rubber suction cup is more d-urable. 2、Vacuum suction cup, strong adsorption, high and low adjustment, splicing balance, independent operation, simple and convenient. 3、Dual hand cup with ratchet for pulling and aligning of work-pieces in assembly work, designed to pull two flat surfaces or seams together. 4、Perfect for any situation in which flat, non-porous surfaces need to be pulled together, shuch as marble and granite, flooring mirrors, , plastics. 5、Material: aluminum alloy and rubber, practical and sturdy. Perfect for seam joining and leveling /stone slabs/countertop/tiles. Features: Stone splicing tensioner, symmetrical design, thicker rubber suction cup is more d-urable. Vacuum suction cup, strong adsorption, high and low adjustment, splicing balance, independent operation, simple and convenient. Dual hand cup with ratchet for pulling and aligning of work-pieces in assembly work, designed to pull two flat surfaces or seams together. Perfect for any situation in which flat, non-porous surfaces need to be pulled together, shuch as marble and granite, flooring mirrors, , plastics. Material: aluminum alloy and rubber, practical and sturdy. Specifications: Color: black+silver Material: aluminum alloy and rubber Suction cup diameter: 123mm Tensile force: 20kg+20kg Package size: 420 * 150 * 130mm / 16.5 * 5.9 * 5.1in Package weight: 1250g / 2.8lb Note: The color of height adjustment levers will be sent randomly. Packing List: 1 * Stone Seam Setter 1 * Stone Seam Setter