It reduces the burden of lifting with bare hands, greatly improves efficiency and makes the work more comfortable If you see a red line during operation, lower the load-bearing object and attach it again until the red line disappears. Rubber Metal Handle Suction Lifter KYKYK Glass Suction Cups, 8inch 150kg Load Heavy Duty Suction Cup Glass Vacuum Panel Lifter Sucker Granite Lifting Window Ceramic Tile Replacement For Replace Windshield, Tile, Marble Floor 350 Lb Load Suction --Reduce the load, easy to carry large plates. Efficient transport: vacuum lifter material transport highly efficient vacuum suction cup is for easy handling of glass tiles and marble worktops. It reduces the load of lifting with bare hands, significantly improves work efficiency and makes work more comfortable However, please note that they do not apply to concave and convex surfaces. 【350 lbs Load Capacity】Tile Suction Lifter can support materials weighing up to 350 pounds, it can remain stable at temperatures of up to -40 degrees Celsius, while it can withstand high temperatures of up to 180 to 200 degrees Celsius without deforming or falling off. 【Efficient Transport】Glass suction cups heavy duty are used for easy handling of materials such as glass windscreens tiles metal furniture and so on. 【Wide Application】Vacuum suction cup glass lifters are perfect for handling materials such as tiles, stone slabs, plasterboard, glass, aluminium plates and steel plates. --Easy to use, red warning line, always remind the safety of work. YUENGJGI 2 Pack 8 Glass Lifter Vacuum Suction Lifter, Powerful --Wide range of applications, suitable for glass, tiles, rock slabs and other large panels. Glass Moving Suction Cups | Best Glass Suction Cups | Awisdom Before use, make sure that the contact surface between the suction cup and the plate is flat, clean and dry.