Stop switch enables you to lock the case feed shuttle back to prevent cases from feeding into the shell plate when cycling the press. Easy installation. Just screw with two original bolts. Built in hinge made for super easy usage, cycle machine to down position and enable stop switch. Built in bulge that locks switch in case ON position.  Great for clearing the shell plate, maintenance, setup, or any time you don’t want cases to feed.  Made from high quality steel. This product is suitable for Dillon 1050 only.