Shank portion of punch for press brake
FIG. 1 is a perspective view of a shank portion of a punch for a press brake showing my new design; 
     FIG. 2 is a front elevational view thereof; 
     FIG. 3 is a rear elevational view thereof; 
     FIG. 4 is a top view thereof; 
     FIG. 5 is a left side view thereof; and, 
     FIG. 6 is a right side view thereof. 
     The broken line showing of a punch for press brake is for illustrative purposes only and forms no part of the claimed design.