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 . <EOS>