a reset cradle with integral reset tool assembly , that automatically positions the lock cylinder , the reset tool assembly , and all associated components , and choreographs the operations that need to be performed in the right sequential order . the reset cradle generally comprises a two - section housing including a base section with centrally - protruding tubular post into which the lock cylinder may be inserted , and a separate hub section rotatably seated on the base . inside the housing , a cam is engaged against the post and is rotatable thereabout along with relative rotation of the two - section housing . a reset member is also operative inside the housing , and is engaged by rotation of the cam for axial displacement into the lock cylinder . similarly , a detent pin is slidably seated in the post and is engaged by the cam for axial displacement into the lock cylinder . relative rotation of the two - part housing resets the lock cylinder via the reset member and detent pin , and allows the lock cylinder to be placed in a learn mode for rekeying without a valid key .