This tool sounds like what we use to build steel tube aircraft fuselages.
Basically a large cutter that puts a "fishmouth" shape into the tubing so it
can be easily slid up against another tube for welding. Call
Wag-Aero-800-558-6868---www.wagaero. com
----------------OR---------------------------better yet,---------"Aircraft
Spruce and Specialty" at 800-824-1930 west coast or 800-831-2949 east
coast and web address for them is www.aircraft-spruce.com note dashed
line between the two words. Bob C
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