Explore THETOP pivot hinges and concealed pivot systems for architectural doors, including invisible-door sets, straight and 90-degree pivots, concealed Type A/B/C sets, positioning and non-positioning central pivots, heavy-duty floor pivots, vertical pivots, offset hinges, strap hinges, body-only options and complete sets. The TT-79 to TT-126B range includes listed capacities from 70 kg to 500 kg on applicable models, plus 304 stainless-steel, brushed-silver and matte-black configurations. Select according to door dimensions and weight, pivot position, mounting layout, positioning function, required accessories, finish and quantity. Send project drawings or installation details for compatibility confirmation and quotation.