... increase the drilling speed (compare with the assembly type). DescriptionApplicationReinfore Concrete, Cured Concrete,Green Concrete, BrickMachine ... Drill, Drilling MachineDiameter1" ~ 25" (25mm ~ 650mm)Core Travel150mm ~ 500mmPower SoureEletric, HydraulicOEM OrderOEM order are welcomeFeatrue1.Thinner ... the drilling speed (compare with the assembly type)2.SED bonding agent provide 20% higher cutting ...