Flexible steel shank, tempered or non-tempered, mostly used in flat sandals to not to deform it.
Steel shankes widely used in PU soles ( polyurethane ), we can supply many models and differents curvatures regarding the buyer necessity.
Steel shanks widely used in PU soles ( polyurethane ), we can supply many models and differents curvatures regarding the buyer necessity.
Tempered tubular steel shanks, widely used into PU soles.