Adjustable indexable drill and modular system and holder

An adjustable drill comprising:

• a drill body having a longitudinal axis, comprising:
• two top face surfaces comprising a drive feature;
• a longitudinal gullet extending from each top face surface along at least a portion of the drill body;
• a cartridge mounted to each top face surface, with one of the cartridges being movable relative to the top face surface and the other being non-movable, each cartridge having a bottom surface configured to cooperate with the drive feature on the top face surface so the cartridge is driven therewith when mounted on the top face surface;
• the cartridges including a cutting face comprising a plurality of insert pockets positioned adjacent the edge of the drill body and at least one cutting insert releasably affixed in each insert pocket, wherein the adjustable cartridge allows adjustment of the position of the cutting inserts associated with the adjustable cartridge, and wherein the cutting inserts on each cartridge are disposed relative to one another in inboard and outboard positions, and are arranged such that the inboard insert on a cartridge begins forming a cut in a workpiece before the outboard insert on the cartridge begins to cut due to the oblique orientation of the top face surfaces.