Made of high strength aluminum alloy for durability, can be used for a long time. Suitable for both indoor and outdoor structural applications including garden sheds and fences. Ideal for forming perpendicular joints in fence railings, greenhouse frames, shed supports or furniture structures. : Slide the square tube into the joint and fix it with screws. The smooth inner fit ensures a firm and balanced grip on all three outlets of the pipe frame or furniture project. Great connectors for building lightweight shelving, pet fences, chair frames, divider supports or reinforcing chain link fence structures., Manufacturer: ordinarYone