Hardness of pyramid section kept high to handle screw pressure.
On the other hand, Hardness of the prongs has been reduced by heat treatment, it can therefore be bent back and forth.
The Modular Adapter is suitable for transtibial [below-knee] and transfemoral (above-knee) prostheses. It is used to create a detachable connection between thermoplastic sockets or frames and the Modular System components.
The socket attachment blocks are bonded to the distal end of the prosthetic socket and then laminated together with it. They serve to connect the prosthetic socket to a socket adapter.