The SmartKey Reset Cradle is a tool used to repair a SmartKey cylinder that has been programmed incorrectly. This can occur if the cylinder will not turn in either direction. Simple and easy to use. Simply remove the lock from the door, remove the SmartKey cylinder plug, insert into the reset cradle and the cradle will reset the cylinder to learn a new key. Here is a video:/embed/-xd7FfULiUA?rel=0&autoplay=1