Patent ID: 7785047

Claim:
A hollow drill comprising: a hollow cutting element having a cutting region disposed on a free end, the cutting body having a longitudinal bore having a multiple-edged inner surface and an essentially cylindrical outer surface, the inner surface having a plurality of inside depressions arranged at regular intervals and opening in the direction of the cutting region, the cutting element having at least one tab disposed on a second end; and a cutter support wherein the cutting element and cutter support are produced as separate components, the cutter support having an orifice disposed on a distal end for receiving the second end of the cutting element, the orifice being frusto-conically shaped in which the diameter of the frusto-conical orifice increases as the orifice extends farther from the distal end, and the cutter support including at lease one elevation, wherein the cutting element is releasably connected to the cutter support when the second end of the cutting element is inserted into the orifice of the cutter support such that the at least one tab releasably engages the at least one elevation.