Top rail fence sleeves may have a simple design, but their role in crafting a strong, lasting fencing system is anything but simple. Crafted from durable aluminum, our top rail fence sleeves stylishly connect two sections of railing. Simply slide the end of each section into the sleeve and you instantly have a strong, stable connection that fortifies your fence. They can also be welded for enhanced strength in applications that demand it, but most residential uses don't require welding.