A reciprocating saw is a type of machine-powered saw in which the cutting action is achieved through a push-and-pull ("reciprocating") motion of the blade. The original trade name Sawzall is often used in the United States, where Milwaukee Electric Tool first produced a tool of this type in 1951.
Example of a variable-speed, reciprocating saw
Reciprocating saw at the Roscheider Hof Open Air Museum
Reciprocating saws have many uses; here one is shown cutting through hard-to-remove nails in a staircase
A saw is a tool consisting of a tough blade, wire, or chain with a hard toothed edge used to cut through material. Various terms are used to describe toothed and abrasive saws.
Roman sawblades from Vindonissa approx. 3rd to 5th century AD
Bronze-age saw blade from Akrotiri, late Cycladic period c. 17th century BC
Saw grinding in Sheffield, 1860
Rip sawing c. 1425 with a frame or sash saw on trestles rather than over a saw pit