A vascular intervention device delivery system, such as for implanting a self expanding stent, includes a thumbwheel rotatably mounted in a handle. The thumbwheel includes a radially outward thumb surface and a radially outward toothed surface that may be moved into and out of contact with a catch by mounting the thumbwheel on a pivot plate within the handle. The pivot plate may be pivoted with respect to the handle between a locked position to prevent rotation of the thumbwheel, and an unlocked position that permits rotation of the thumbwheel. A catheter has a proximal end attached to the handle, and a distal carrier segment for mounting a vascular intervention device thereon. A retractable sheath is movable from a first position covering the distal carrier segment to a second position retracted proximally uncovering the distal carrier segment. A pull extends between the thumbwheel and the retractable sheath.
