the hole without the use of pressurized air therefore when drilling through a known carcinogenic material blowing is not needed to avoid drill bit 10 binding however the shaft 12 can include a conventional passage 121 to permit pressurized air to be forced through the air gaps 84 in an alternative embodiment shown in fig4 through 6 pressurized air is forced through a passage 122 which extends partially down the axial length of the shaft 12 the pressurized air is used to blow off loosened debris of the solid body created during the drilling process that if allowed to build up could bind the drill bit 10 as the hole is being drilled drill bit binding causes delays in the drilling process thus by blowing off the debris and avoiding drill bit binding the rate at which a hole can be drilled is increased the pressurized air also acts to cool the drill bit and shaft and further prevents the drill bit and shaft from annealing in this embodiment an outer sleeve 124 is fixedly attached to an end of the shaft 12 at an opposite end of the shaft 12 the sleeve 124 is not fixedly attached the shaft 12 passes through the interior of the sleeve 124 the sleeve 124 is spaced a distance from the shaft 12 so that the shaft 12 is approximately centered within the sleeve 124 as pressurized air is introduced through the passage 122 it passes through the interior of the shaft 12 until the air reaches an outlet 126 between the fixed and free ends of the sleeve 124 the air then travels down along the shaft 12 through the space between the shaft 12 and the sleeve the air is then.