General description Heavy duty steel body with diamond dust cutting segments, designed for dry cutting of accurate holes in masonry. This kit is suitable for use with drills equipped with a safety clutch, but should not be used with hammer action. Technical specifications Includes 6 core drills: 38mm, 52mm, 65mm, 107mm, 117mm, and 127mm 2 cutting discs 2 arbors: SDS Plus and hex Guide drill bit Drift key