Stone Edge Surfaces Joint Cutting “Round End" concrete carving tool is the perfect decorative concrete or concrete overlay carving tool. Stone Edge Surfaces Round End joint carving tool is used for the shaping and cutting of Vertical and Horizontal decorative concrete mixes to get a softer rounded or imperfect edge and bottom look of grout between tiles or to make incredible open pore grout lines in hand carved flagstone. Lots of other uses for the stone edge surfaces concrete carving tool as well. This is a simple hardened steel hand held concrete carving tool designed to be used on fresh, green, still workable decorative concrete or concrete overlays, to easily carve, scrape and remove excess mix to add realism.