PLASTIC PROFILES FOR USE AS CONNECTORS FOR ADJACENT DRYWALL PANELS; PLASTIC PROFILES FOR USE IN CONNECTING AND FINISHING THE INTERSECTIONS OF DRYWALL PANELS AND CEILING ANGLES; ADJUSTABLE PLASTIC ANGLES, INCLUDING 180 DEGREES, FOR INTERCONNECTING EDGES OF ADJACENT PANELS OF WALL BOARD AND GYPSUM BOARD; PLASTIC CORNERS FOR USE IN INTERLOCKING AND FINISHING DRYWALL PANEL EDGES IN BUILDING WALL, CEILING AND SOFFIT CONSTRUCTION AND REFINISHING; END-TO-END PLASTIC CONNECTORS FOR CONNECTION AND ALI...