1. A metal cutting blade in a Sawzall (recip saw). Cheap, relatively fast.

2. A Tenyru style metal cutting blade in a circular saw. Fastest, more
expensive ($40-50 for the blade), very noisy. VERY hot chips.

3. A cut off wheel in an angle grinder. Cheap, slow, noisy, dirty.

Do NOT cut it with Qxy-fuel torch. It's too easy to introduce O2 &
create an explosive mixture. None of my choices have any danger.

Bob