Profile: Hagby U.S.A., Inc. is a supplier of diamond hydraulic core drills and diamond construction products. Our products include Onram 100, Onram 500, plastic core boxes and wooden core boxes. Our Onram 100 core drill is a light duty core drill used in grout hole drilling for dewatering or for drainage applications in dams and hydroelectric projects. Our Onram 500 used in civil engineering industries and with construction companies.