10-inch Wet Drilling: Our standup core drilling machine with stand can perform wet drilling, and you can feel assured of accuracy when boring holes in a variety of surfaces with a 10 in / 26 cm diameter hole capacity. Note: The drilling bit is not included. Capable Coring Efficiency: A 2500W powerful motor and 750RPM high-speed gearbox are intentionally taken to complete diversified drilling projects, allowing the operator to adjust based on the specific material being drilled. Max Drilling Depth: 23.62 in / 60 cm. Arbor Size: 1-1/4" Thread. Expertly Designed for Security: Our diamond core drill rig integrates a secure clutch with an overload protection device to work by automatically tripping when the drill bit becomes stuck or encounters resistance beyond a certain level, further reducing the risk of operator damage and injury during the operations.