The locking tube pins are suitable for both round and square pipelines, can be widely applied to canoe paddle, tent pole and other locking pipelines, are very practical accessories in daily life.   Spring clips are simple and convenient for you to assemble inside the pipelines, and you can effortlessly lock or open by pressing a button round or square pipelines, saving your time and effort in the installation process.   Good spring clips are made of quality stainless steel, firm and stable in construction, not easy to break or deform, can be kept and applied for a long time.