Abstract: In a patterned matrix for use in conjunction with the skiving of shoe parts upon a splitter machine, the pattern matrix being applied contiguous with the intended shoe part for application to the machine, the pattern matrix including along its edge a relief or raised portion that urges the aligned edges of the shoe part into a greater skiving out than any other portion of the shoe part, and another relief being of greater density, comprising a cord, arranged within the first relief or raised portion and effecting during skiving a deeper cut into the intended shoe part to assure a uniformly weakened area for forming the fold line for the shoe part when being fabricated into a shoe component. A pair of patterned matrixes may be adhered together, as through a pressure sensitive material, with the relief member therebetween, for allowing usage of the patterned matrix for forming skived edges upon shoe parts of reverse proportions, as where each may be constructed into a pair of shoes.