After showing five sharp blades, the performer puts them in a plastic case. He removes the blades from the case, and places them in his mouth. A bit of thread is then put into his mouth. The thread is then slowly pulled out, and the blades are now shown to be attached to the thread! This is a high precision product - offering a new and better method for switching blades. This is a completely revised design, and is completely removable. You will be able to present this classic effect of blades coming out of your mouth, strung on a thread.