Features: 1. Made from lightweight and durable materials, resistant to wear after repeated use, providing enhanced strength and durability, suitable for heavy countertops. 2. Adjustable height knob: height on both sides can be adjusted as needed, allowing real-time monitoring of tile spacing for easier and more precise alignment to achieve optimal joints. 3. Adjustable stone seam setter: this suction-based tool is designed to bring workpieces and seams together during assembly, enabling seamless splicing with simple operation. 4. Powerful suction cup: equipped with a vacuum rubber suction cup made of high-quality rubber, offering strong adhesion, durability, and extended service life. 5. Suitable for use on marble, granite, floor mirrors, glass, plastics, or any application requiring flat, non-porous surfaces to be drawn together. Notice: 1. Actual color may vary slightly from the image due to differences in monitor displays and lighting. 2. Please allow 1-3 cm variation due to manual measurement. Specifications: Aluminum Alloy Countertop Tensioner Material: Aluminum alloy + rubber Size: Total length 390 mm, suction cup diameter: approximately 120 mm Suction capacity: 50 kg (110.2 lb) Rubber thickness: 7 mm Height adjustment range: 120 mm Spacing adjustment range: 20 mm Iron Countertop Tensioner Material: Iron + rubber Size: Total length 425 mm, suction cup diameter: approximately 145 mm Rubber thickness: 8 mm Height adjustment range: 115 mm Spacing adjustment range: 20 mm Package Includes: 1 x Stone Seam Setter