USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 2/TASK 2
from their holes; and to align holes in different sections of metal.
Special punches are designed to install grommets and snap fasteners. Bench-
mounted punching machines are used to punch holes in metal one at a time, or
up to 12 holes simultaneously.
SOLID PUNCHES AND PUNCHING MACHINES.