Patent ID: 8622666

Claim:
An adjustable drill bit for drilling holes of various sizes, the drill bit comprising: a first stop disposed on a shaft, the first stop comprising a drill tip, wherein the shaft comprises a non-threaded shank portion disposed adjacent the first stop, a threaded portion disposed adjacent the shank portion and an engagement portion disposed adjacent the threaded portion; wherein the non-threaded shank portion is located between the drill tip and the threaded portion and wherein the threaded portion is located between the non-threaded shank portion and the engagement portion; a plurality of cutting disks disposed on the a non-threaded shank portion, each cutting disk having a cut out portion with a first cutting surface and a second cutting surface, each first cutting surface configured to cut only when the drill bit is rotated in a clockwise direction, and each second cutting surface configured to cut only when the drill bit is rotated in a counter-clockwise direction; and a second stop rotatably received on the threaded portion of the shaft such that the cutting disks are held in compression between the first stop and the second stop.