B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
B23B 51/12 (2006.01) B23B 51/10 (2006.01) B25B 21/00 (2006.01)
Patent
CA 2257040
A drill for interchangeable use on a screwdriver bit. The drill is mounted on a shank, the shank having an opening at the end remote from the drill for rapid placement of the shank on and removal of the shank from the screwdriver bit locked in the chuck of an electric powered rotating unit to permit drilling a screw hole and then, upon removal of the drill from the screwdriver bit using the screwdriver bit for installation of a screw. A countersink may also be mounted on the shank with the drill.
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