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Surgical bone drill bits designed to excavate the intramedullary bone canal when held and revolved by a rotatory manually propelled or powered device (e.g., a handpiece or hand drill). These devices typically consist of a hollow cylindrical shank of steel or other hard metal with a uniform cross-section. They include a working end with cutting edges and a notched or elongated proximal end that may be an integral part of a manually propelled instrument or fit into the rotary device. Intramedullary cannulated drill bits are frequently used to excise tissue from the bone stem in orthopedic procedures prior to prosthesis implantation.
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