The ornamental design for an ambidextrous fingershield, as shown and described.
FIG. 1 is a front elevation view of a finger shield according to the present invention.
FIG. 2 is a rear elevation view of the finger shield shown in FIG. 1.
FIG. 3 is a top plan view thereof.
FIG. 4 is a bottom plan view thereof.
FIG. 5 is a right side elevation view thereof.
FIG. 6 is a left side elevation view thereof.
FIG. 7 is a front/left side perspective view thereof; and,
FIG. 8 is a front/right side perspective view of the ambidextrous finger shield shown in FIG. 7, but turned upside-down to accommodate the user's other hand.
The broken lines shown in FIGS. 7 and 8, which illustrate how the user would insert their left or right hand into the ambidextrous finger shield, form no part of the claimed design.