To the invention it is easy to work at it to ensure that the outer shell is formed by 10 each wife Connection amenities piping in an apartment connected to the joint by wrapping a hexagon to tighten the connection joints or damaging the outer connection joint for a full course, narrow work space It relates to a flat pipe dedicated wrench to adjust the grip angle of the wrench, in constituting the spanner to configure the clamping head on both ends of the handle to operate the connection joint of pipe for an apartment plants, of the spanner the clamping head of the holding surface forming a six-sided to form a any one place the fold of the handle and stop a folded configuration, or the handle to maintain a straight line has ssuiwoseo the elastic cap usually has an elastic rubber pipe or plastic pipe to the fold-hole the formation, and stop ball bonded to the stop hole to the inner surface that is friction in the handle is Tangier a spring and as the metal fixing cap forming a friction protrusion on the outer surface slip along the handle so as to surround the fold the folding operation of the fold according to considering configured to control, the central heating pipes and water supply and drainage pipe pressure of complicated plumbing fixtures in the apartments piping, especially piping in a narrow space, operating the pipe joint constituting 10 each, the outer surface of each of the piping invention is a novel one to have the convenience of the operation and efficiency of use to the glass without damaging standing operation.