Reinforced design, the thick tube is increased to 0.5 mm to carry heavier load. The stainless steel material and high-quality coating make the surface not easy to scratch and rust and easy to clean.Easy installation: it is used between window frames or door frames. No screws or holes are required during installation. It is fixed by loosening to the desired length and non-slip end pieces. It can be disassembled without leaving any residue by turning it lightly. The expansion bar will not damage the wall or other surfaces.Non-slip rubber: non-slip rubber design on both ends, with slip and friction, can provide a firm and secure grip and is not easy to fall. The built-in large spring ensures sufficient tension and has better pulling and pushing performance.