OpenClose Clarke Diamond Core Bit For Concrete and Reinforced Concrete Laser Welded Segments for Desired Robustness and Durability Suitable For Use With Diamond Drilling Machines Designed For Wet Drilling TECHNICAL DATA PRT No Description DCB14X300C DIAMOND CORE BIT 14MM X 300MM DCB24X300C DIAMOND CORE BIT 24MM X 300MM DCB25X450C DIAMOND CORE BIT 25MM X 450MM DCB51X450C DIAMOND CORE BIT 51MM X 450MM DCB76X450C DIAMOND CORE BIT 76MM X 450MM DCB102X450C DIAMOND CORE BIT 102MM X 450MM DCB127X450C DIAMOND CORE BIT 127MM X 450MM DCB152X450C DIAMOND CORE BIT 152MM X 450MM DCB178X450C DIAMOND CORE BIT 178MM X 450MM DCB200X450C DIAMOND CORE BIT 200MM X 450MM.