block 62 a slot 72 is cut into the surface of the block 62 to permit an upward force to lift the latch member 68 against the shoe sole the heel portion of fig5 is identified by numeral 16 and seen to include a circular socket or recess 74 whose outside dimension is sized to receive the block 62 therein with a close tolerance fit projecting a slight distance upward from the base 76 of the recess 74 is a spacer 78 which is attached at its lower end to the core of the shoe heel 16 resting atop the spacer 78 is a rectangular plate 80 whose dimensions are such that it is capable of being inserted through the rectangular aperture 64 formed in the block 62 when the heel is turned at approximately 45 u00b0 to the longitudinal axis of the shoe the height dimension of the pedestal 78 is such that the plate 80 will be positioned in alignment with the rectangular slot 66 when the upper heel surface 82 is adjacent the sole of the upper now when the heel is rotated 45 u00b0 so as to be appropriately aligned with the shoe upper the rectangular plate 80 will have its.