1-3/8″ X 50 GRIT DIAMOND CORE DRILL

Diamond Core Drill, 1-3/8″ Diamond Core Drill, 1.38″ Outer Diameter, 1.28″ Inner Diameter, 5/16″ Shank Diameter, 1″ Shank Length, 2-1/4″ Overall Length, 50 Diamond Grit Size, 1 per Pack”