EDiamondTools 12 in. General Purpose Segmented Diamond Saw Blades for Concrete and Masonry, 12mm Segment Height, 1 in./20mm Arbor GP12X - The Home Depot
adapter connector M22 Diamond Core Drill Machine Convert to 1/2-20 UNF Chuck Range 3-16mm/2-13mm/1.5-13mm/5-20mm Hand Drill - AliExpress