a powerful, specialized sabre saw with a horizontal, sabre saw
Like a jigsaw on steroids, the reciprocating saw is a heavy-duty workhorse best suited to large-scale construction and demolition tasks. If a project you're working on requires for one, pick it up at a rental center. Home Improvement Encyclopedia
A power saw where the blade moves back and forth during cutting.
A reciprocating saw is a type of saw in which the cutting action is achieved through a push and pull reciprocating motion of the blade.