Jig saw is a common power tool primarily used for cutting curved lines, circles, and unique shapes into a range of materials, including thin metal, laminate, plastic, ceramic tile, and wood. The handle is located at the top of the jigsaw, with a trigger switch to turn it off or ongsaw is a common power tool primarily used for cutting curved lines, circles, and unique shapes into a range of materials, including thin metal, laminate, plastic, ceramic tile, and wood. The handle is located at the top of the jigsaw, with a trigger switch to turn it off or on