... concrete and brick wall. Diamond Core Drill Bit for Concrete - Single TypeSCB series diamond core drill bit has excellent ability in drilling ... assembly type). DescriptionApplicationReinfore Concrete, Cured Concrete,Green Concrete, BrickMachine TypeHand Drill, Drilling MachineDiameter1" ~ 25" (25mm ~ 650mm)Core Travel150mm ~ 500mmPower SoureEletric, HydraulicOEM ...