Step drill bit

A step drill bit comprising:

• a shank extending along a bit axis;
• a body having a proximal end adjacent the shank and a distal end opposite the proximal end, the body including a bit tip adjacent the distal end, the bit tip including a diameter measured in a direction perpendicular to the bit axis, the body defining a plurality of axially stacked, progressively sized steps including a first step adjacent the bit tip and a terminal step at the proximal end, the plurality of steps including a plurality of stop-on steps and a plurality of intermediate steps, each step of the plurality of steps defining a length measured in a direction parallel to the bit axis and a diameter measured in a direction perpendicular to the bit axis;
• a flute formed in the body, the flute extending from the distal end to the proximal end;
• and a cutting edge extending along the flute;
• wherein a majority of the plurality of steps are intermediate steps;
• and
• wherein a ratio of the diameter of the bit tip to the length for the majority of the plurality of steps is in a range from 1.0 to 1.5.