Horizontal band saws utilize a thin metal “ribbon like” loop with hardened teeth moving in a generally horizontal plane to cut metallic objects. The moving blade sweeps an arc thru a fixed cutting plane to produce repeatable fixed angle cuts. Only straight cuts at a fixed angle can be made on the horizontal band saw. A Circular Saw Machine is a power-saw using a toothed or abrasive disc or blade to cut different materials using a rotary motion spinning around an arbor. http://www.chenlongbandsaw.com/band-saw-machine/horizontal-band-saw/