A sterile, sharp bevel-edged, hollow tubular metal instrument designed to obtain a specimen of spinal bone percutaneously or during open surgery. The device is typically available in a variety of large bores, and is sufficiently robust to penetrate vertebral bone with the force of pressure and twisting manually applied to its proximal handgrip. The resultant specimen is typically used for the pathological analysis of the source of blood cellular elements. This is a reusable device.