Patent ID: 8602503

Claim:
A base block for a cutting drum, comprising: a first end including: an opening configured to receive a tool having a flange with a flat lower surface, wherein the flat lower surface of the flange is perpendicular to a longitudinal axis of the tool; a flat surface surrounding the opening, wherein the flange is configured to be located at least partially above the flat surface during operation; a second end configured to abut the cutting drum; an internal passageway commencing at the opening configured to receive the tool, the internal passageway defining a longitudinal axis, the axis being offset by an acute angle from being perpendicular to the flat surface; and a key located on the flat surface, wherein the key has at least one surface configured to abut a surface of the tool to prevent the tool from rotating about the tool longitudinal axis, wherein the at least one surface of the key has one or more recessed surfaces configured to mate with one or more protrusions of the tool.