need help?

Question

when you need to cut new external threads on a bolt, which of the following tools should you use
a. A die
b.A hacksaw
c.A tap
d.A diamond-point chisel

ps. i know it has to be a or c

Answer 1

If you have access to a computer to post a question, don't you have access to research tools on the internet?

http://en.wikipedia.org/wiki/Taps_and_dies

Answer 2

a, a die.