I have a small pull-saw that I got a Lowes. I have had several of them, and for some reason, when some people come to visit, they invariably try it out - usually on a piece of steel, for some reason. I guess they must think it is a hacksaw, although the blade is very flexible.
It does cut fast and accurately, when used on wood. The blade is replaceable.
Would really like to get one or several of the dual-sided saws.