The industry's first 3-speed hand-held hydraulic core drill. This powerful wet diamond core drill is designed for fast, accurate drilling in concrete, reinforced concrete and other masonry materials. Use it hand-held up to 3" diameter or mounted in a drill stand up to 6" diameter. The hydraulic motor operates at 2000 PSI oil pressure. The required flow is 6 GPM. Additional flow is automatically by-passed back to the tank up to a maximum input of 13 GPM.