Key head
FIG. 1 is a top, front, and right side perspective view of a key head showing my new design; 
     FIG. 2 is an enlarged right side elevational view thereof; 
     FIG. 3 is an enlarged left side elevational view thereof; 
     FIG. 4 is an enlarged front elevational view thereof; 
     FIG. 5 is an enlarged rear elevational view thereof; 
     FIG. 6 is an enlarged bottom plan view thereof; and, 
     FIG. 7 is an enlarged top plan view thereof. 
     The broken-line disclosure of a portion of the key shank and bow is for illustrative purposes only and forms no part of the claimed design.