Small Diamond Core Drill

• Sizes available: 1.00, 1.25mm, 1.50mm, 2.00mm, 2.50mm, 3.00mm, 3.50mm
• They look similar to our small solid diamond drill bits but with a hole through the middle (hollow), allowing water to circulate inside the core.
• Good for drilling holes in glass, tile, ceramic, porcelain, beads, pebbles, gemstone, fossilized bone, optical material, composites and rock.