boring bar from CTC

Hi Y'all,
I need to bore a 15.75mm hole in aluminium. The boring bar that came with my lathe is too big for the job, so I'm looking at something like this from CTC:

SCLCR/L INDEXABLE BORING BAR #I33 (http://www.ctctools.biz/servlet/the-612/indexable-iso-standard-lathe/Detail)

The tool holder appears to be oval shaped with flats on two sides. CTC don't seem to sell special holders for them, so do I just clamp it in the 4-way tool post between the flats?

I recall reading that CTC were...

Source: http://www.woodworkforums.com/f65/boring-bar-ctc-151916/

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