Review on Kapro 301-01 7-Inch T-Bevel: Stainless Steel Blade for Precision Measuring by Francisco Taylor

This seems as good as any medium sized plastic bevel. It looks like ABS plastic, not fiberglass reinforced, but is good for DIY assembly; A professional will likely purchase a model made of wood, brass, and stainless steel. It has some features that others might not have: beautifully engraved stainless steel (not just painted), ruler and screw, trim sensor, thumb button (Love or Hate), bubble level and markings on the handle for .15, 30, 45, 60.75 degrees (although they are difficult to read). Red plastic can even come in handy if that's what you're looking for, as opposed to a black or dark colored pen. I've never seen this brand before, but they have an extensive set of layout tools.