Michael, Best & Friedrich
Hole producing assembly
 A hole producing assembly for a power drill including an adapter having one end operationally connected to the power drill such that the power drill rotates the adapter about an axis of rotation, the other end of the adapter includes a threaded shaft having threads that are of the four-start type, a cutter which has threads thereon that are complementary to the four-start threads on the adapter so that the cutter is threadably connectable to the adapter, the cutter has a cutting projection extending from the base and terminating in a cutting edge, and a spacer positioned between on the shaft of the adapter to aid in removal of the cutter from the adapter after use. The hole producing assembly can also be used in a nested cutter mode wherein a second cutter is threaded onto the shaft of the adapter, or with a speed reducer such that the cutter or nested cutters rotate at a speed slower than the rotational speed produced by the drill motor, or can be used with an arbor extension to drill holes in hard to reach materials. 
Evergreen Tool Co., Inc.
Y Y B Y Y
Y10S Y10T B23B Y10T Y10T
additional additional inventional additional additional
James R.
Anderson