Patent ID: 7090447

Claim:
A tool for drilling countersunk holes comprising: a drill having a central longitudinal axis; said drill comprising a fluted shaft portion comprising at least one flute; a clamping ring comprising a countersinking arrangement; said clamping ring being configured to be disposed to surround a part of said fluted shaft portion of said drill and to form at least one opening between said at least one flute and said clamping ring; said clamping ring comprising at least one threaded hole being disposed through said clamping ring and being configured to be disposed essentially radially with respect to said longitudinal axis of said drill; at least one clamping shoe being configured to be disposed in said at least one opening and adjacent said at least one threaded hole; and at least one locking screw being configured to be screwed into and through said at least one threaded hole to contact said at least one clamping shoe to clamp said clamping shoe against said at least one flute and to clamp said clamping ring to said drill to permit countersinking of holes drilled by said tool.