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The first LRRCW model of
the No.2 drill retained the slender shape of the earliest No.2 types
because
the two-jaw, springless chuck could hold bit shanks no larger than
3/16ths
inch diameter. The associated drilling thrust did not tax a man's
grip. Later types such as the Type JI at right, carried chucks
that
accepted larger bits, 1/4 inch in the case of the Type JI, and so a
nudge
with the shoulder as well as a grip on the side handle were in
order.
Hence, the mushroom shape of the end cap.
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