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Steel Dragon Tools 4in. (102 mm) Wet Diamond Concrete Core Drill BitSteel Dragon Tools® 4 in. (102 mm) wet diamond laser-welded masonry core drill bit. For use wet drilling asphalt, block, brick, concrete, pavement, and other materials. Wet drilling only.Bit Size: 4 in. (102 mm)Drilling Depth: 14 in.Spindle Thread: 1-1/4 in. – 7For use on asphalt, block, brick, concrete, pavement, and other materials.Wet drilling only.10 mm laser-welded split segments for improved operating life.Fits Hilti® and Milwaukee® drill rigs.Overall Height: 16-1/2 in.