The Doctor usually relies on his intelligence, wit, and understanding to solve most of his problems and to get out of tricky situations. However, it is always nice to have his sonic screwdriver when the situation calls for it. This mysterious tool seems to have the ability to do just about anything the Doctor requires. It can open a door or do a medical scan. This is one heck of a tool. This necklace features a hanging 11th Doctor screwdriver.