plurality of self locking hinges 76 each self locking hinge 76 itself consists of three main parts a first hinge portion 12 a second hinge portion 14 and a spring loaded self locking latch 16 each hinge portion has a main body portion and a connecting portion containing lobes designed to connect the two hinge portions the first hinge portion 12 has a main body portion 18 and a connecting portion 20 with two lobes 26 and 54 the second hinge portion 14 has a main body portion 22 and a connecting portion 24 with a single lobe 28 the main body portions of the hinge portions are designed to allow the hinge portions to be engaged with poles or other devices in fig1 the main body portion 18 of first hinge portion 12 is disposed in pole 30 while the main body portion 22 of second hinge portion 14 is disposed in pole 32 the main body portions of the hinges can be made in a variety of geometric shapes so that they can be connected with variety of different shaped poles or devices requiring the invention 10 the preferred embodiment of the invention 10 is to have the main body portions of the hinges cylindrical in shape so that they may be accepted into a hollow cylindrical pole device the invention 10 can be made in any size depending on the application needs the parts of the invention 10 can be made from metal in the preferred embodiment the spring 42 is made from steel the pin 46 and rod 56 are both made from hardened steel and the remaining parts are made from aluminum the parts are simple in design and can be made using.