SMT stencil are used to transfer the solder paste to the printed circuit board. The precision and high quality of the SMT stencil is essential for the assembly process because of the optimal amount of solder paste that will be deposited.
SMT stencils specification:
Frameless SMT stencils are used for prototype and small batch production. They are not glued to the frame and are cheaper.
Framed SMT stencils are used for volume batch production. The laser cut stencil is glued to the metal frame.