This spindle works with an LKM7000 and 10K Series. The spindle is cut for an 1-3/4" Door. Most doors are standard 1-3/4 " Thick. The spindle will save the installer from cutting the spindle in the field . The tubes spindles are stainless and are time consuming to cut. The spindle will engage the front trim gear in the center so it will not protrude through the front of the trim and rub the combination lock dial ring.