A foldable paddle blade and shaft comprises a planar elongate polymer plastic substrate with two angularly directioned weakened hinge lines which extend inwardly and angularly from a location at or near one elongate end of the substrate’s lateral edges to form a blade with sidewalls and a free terminal end. The clamp circuit utilizes low area and power overhead, has a sharp clamp characteristic, and little degradation in the small-signal DC gain at the \u201cknee\u201d of the clamp characteristic. The bayonet coupling enables the handles of the assembly to be fully separated for cleaning. 5 wt % to 75 wt % of a polymeric binder, 5 wt % to 95 wt % of filler particulates having an average particle size from about 0. Damage to the doped polysilicon layer during etching is prevented by the protective layer containing the recess. of at least one rubber-modified vinyl polymer prepared in the emulsion polymerization process,D) 2 to 16 parts by wt.