Step Drill Bit

FIG. 1 is a perspective view of the step drill bit.

FIG. 2 is a left side view of the step drill bit of FIG. 1 .

FIG. 3 is a right side view of the step drill bit of FIG. 1 .

FIG. 4 is a front view of the step drill bit of FIG. 1 .

FIG. 5 is a rear view of the step drill bit of FIG. 1 .

FIG. 6 is a top end view of the step drill bit of FIG. 1 ; and,

FIG. 7 is a bottom end view of the step drill bit of FIG. 1 .

The portions in broken lines form no part of the claimed design.