or metal hollow threaded anchoring device 12 comprises a hollow cylinder 1 with an opening 2 in its upper end opposite a threaded end whose molded threads become progressively smaller in depth and overall diameter as the tip 9 is approached the small shallow threads near the tip 9 allow for easy penetration of the sand at the time of insertion and better penetration into more compacted deeper sand several inches beneath the surface as the threads are inserted deeper through a turning motion applied to the molded wings 3 the progressively larger and deeper threads nearer the top allow for better gripping of the device into the less compact surface sand the design of the threads employs a rounded lower thread edge 11 which pushes sand out on the way on insertion and a flat upper thread surface 10 which holds sand better and makes it harder for the threads to be pulled forcibly out of the sand without the device being screwed out on purpose just beneath one of the molded wings 3 a hole 6 is bored or molded through the wall of the cylinder 1 and into the hollow center cavity into this hole is screwed a threaded metal insert 7 to serve as recipient for the threaded metal or plastic thumbscrew 8 the thumbscrew 8 when screwed into the screw insert 7.