Thecp 0009 ac Rotary Hammeris designed for a wide variety of construction and maintenance applications such as driving or setting masonry anchors and drilling holes in concrete, bricks or rock. As a hammer, these tools can be used for chipping, scarifying, scaling and cleaning welds. These versitile tools are both a drill and a chipping hammer. A push of the rotation release button easily and quickly converts the tool to a hammer.