The base TCC-PB-E is in glass-fibre reinforced polyamide based (PA) technopolymer, RAL 9005 (C9) black colour or grey RAL 7040 (C33) colour, matte finish. The screws and nuts cylindrical-head screws with hexagon socket in AISI 304 stainless steel with anti-seizure treatment. Self-locking nut in AISI 304 stainless steel. The standard executions TCC-PB-E with external teeth and TCC-PB-S without teeth. A base with external teeth can be joined to a clamp with internal teeth, or a base without teeth to a clamp without teeth, to create a hinged joint. Joints comprising bases with external teeth and clamps with internal teeth (36 teeth) have a 10º adjustment angle. Joints comprising bases and clamps without teeth can be positioned at any angle.