Color: Silver; Material: Manganese Steel; Body Size: 36 x10 x 0.5 mm/1.42 x 0.39 x 0.02 inch (L*W*T); Push Buttons Size: 8.3 x 8 mm/0.33 x 0.31 inch (L*Dia); Packing List: 5 x Spring ClipsAdvantage: Made of manganese steel and with a nickel-plated surface, it is flexible, has long-lasting elasticity, not easy to break and rust. It is hardened by a superb heat treatment process, making it more wear-resistant, sturdy, and durable for long service life.Instruction: Bend the clip, put the clip into the rod, snap the button clip into the hole, and push the outer tube until it catches the button.Application: The locking tube pins are very useful accessories in daily life, they are used to lock round and square pipes. For quick release, telescopic, folding, etc.