Thermally curable undercoat composition comprising for producing a bilayer relief image comprising:a) a polymer of Structure I comprising repeating units of Structure II, III, and IVb) a phenolic crosslinker;c) a thermal acid generator ; andd) a solvent. The present invention attaches to any hose location with a wrist rotation whereby a portion of hose is inserted into a transversal member and then other different adjacent hose portions are abuttably received by each of the two engaging members, respectively. This substantially reduces the risk of a detection error relative to the actuation of a key.