An intraluminal guide wire device, comprising: a hollow elongated shaft comprising a proximal end and a distal end, the hollow elongated shaft extending between the distal end and the proximal end; a user actuation segment positioned proximal to the proximal end of the hollow elongated shaft, the user actuation segment configured for movement relative to the hollow elongated shaft; a core wire extending between the user actuation segment and a distal portion of the hollow elongated shaft; and an inner member comprising: a proximal end of the inner member positioned at least partially within and fixed relative to the user actuation segment, and a distal end of the inner member configured for placement at least partially within and for axial movement relative to the hollow elongated shaft, wherein the core wire passes through the inner member, wherein a locking segment of the inner member configured for placement within the hollow elongated shaft is configured to exhibit a friction-based restraint on movement within the hollow elongated shaft, the friction-based restraint on movement being a frictional force between an outer surface of the inner member and an inner surface of the hollow elongated shaft, wherein the locking segment of the inner member includes at least one bend, such that when the locking segment of the inner member is inserted within the hollow elongated shaft, the at least one bend of the inner member is configured to exert the frictional force upon the inner surface of the hollow elongated shaft. a hollow elongated shaft comprising a proximal end and a distal end, the hollow elongated shaft extending between the distal end and the proximal end; a user actuation segment positioned proximal to the proximal end of the hollow elongated shaft, the user actuation segment configured for movement relative to the hollow elongated shaft; a core wire extending between the user actuation segment and a distal portion of the hollow elongated shaft; and an inner member comprising: a proximal end of the inner member positioned at least partially within and fixed relative to the user actuation segment, and a distal end of the inner member configured for placement at least partially within and for axial movement relative to the hollow elongated shaft, wherein the core wire passes through the inner member, a proximal end of the inner member positioned at least partially within and fixed relative to the user actuation segment, and a distal end of the inner member configured for placement at least partially within and for axial movement relative to the hollow elongated shaft, wherein the core wire passes through the inner member, wherein a locking segment of the inner member configured for placement within the hollow elongated shaft is configured to exhibit a friction-based restraint on movement within the hollow elongated shaft, the friction-based restraint on movement being a frictional force between an outer surface of the inner member and an inner surface of the hollow elongated shaft, wherein the locking segment of the inner member includes at least one bend, such that when the locking segment of the inner member is inserted within the hollow elongated shaft, the at least one bend of the inner member is configured to exert the frictional force upon the inner surface of the hollow elongated shaft.