It soon became one of the largest surgical instrument manufacturing concerns in the U.S. The second CBI team returned to the "surgical instrument" theory. Sialkot is also the world's largest centre of surgical instrument manufacturing. Specialized surgical instrument called a radiofrequency handpiece is used. Dr. Craig bragged to Westphall that Domedion gave him a valuable surgical instrument. An orbitoclast is a surgical instrument used for performing transorbital lobotomies. The Mogen clamp is a surgical instrument which permits rapid circumcision. A surgical instrument can be heard being dropped in the background. He invented the snook hook, a surgical instrument which is still used in spaying animals. A bone cutter is a surgical instrument used to cut or remove bones. Each arm has a unique surgical instrument and performs a specialized surgical function. For much of the 19th century, however, the chain saw was a useful surgical instrument. The Harmonic scalpel is a surgical instrument used to simultaneously cut and cauterize tissue. A tenaculum is a surgical instrument, usually classified as a type of forceps. The scalpel is the preferred surgical instrument of many ear, nose, and throat specialists.