https://www.rocdia.com/ daily https://www.rocdia.com/products/rdt-laser-welded-diamond-core-drill-bits-2-12 2026-07-20T03:35:10-06:00 daily https://cdn.shopify.com/s/files/1/0741/7861/files/rdt-size-lineup-with-boxes.jpg?v=1784478526 RDT Laser-Welded Diamond Core Drill Bits (2–12") Red diamond core bits arranged by diameter with shipping boxes