http://www.durgan.org/URL/?HIWAY 21 May 2010 Tomato Ring Support
The tomato ring is supported by half inch diameter rebar. Rings can be added as the plant grows, and at first look appears to be the best support that i have encountered, with minimum effort required. A ring was placed on each of the 21 tomato plants. This is the first year using this type of support. I have used all systems over the years, and all had various deficiencies.
http://www.durgan.org/URL/?JMRZU Rings ordered from this site.