I claim the ornamental design for a wood boring bit, as shown and described.
FIG. 1 is a perspective view of a wood boring bit embodying the invention.
FIG. 2 is a front view of the wood boring bit shown in FIG. 1.
FIG. 3 is a rear view of the wood boring bit shown in FIG. 1.
FIG. 4 is a left side view of the wood boring bit shown in FIG. 1.
FIG. 5 is a right side view of the wood boring bit shown in FIG. 1.
FIG. 6 is a top view of the wood boring bit shown in FIG. 1; and,
FIG. 7 is a bottom view of the wood boring bit shown in FIG. 1.
The elements shown in broken lines are included for the purpose of illustrating environment and form no part of the claimed design. The portions shown in broken lines having unequal length segments illustrate the boundary of the claimed design and form no part of the claimed design.