The ornamental design for a knucklecap, as shown and described.
The embodiment shown in the drawings is for a knuckle cap for a glove to be worn on the right hand of the wearer. The embodiment of the present invention for the left hand has not been shown as it would be the mirror image of the embodiment shown, and its shape and appearance are evident from the embodiment shown.
FIG. 1 is a front perspective view of a glove showing my design.
FIG. 2 is a front elevation view of the glove of FIG. 1.
FIG. 3 is a right side elevation view of the glove of FIG. 1.
FIG. 4 is a left side elevation view of the glove of FIG. 1.
FIG. 5 is a top plan view of the glove of FIG. 1; and,
FIG. 6 is a bottom plan view of the glove of FIG. 1.