VEVOR Diamond Core Drilling Machine, Drill Diameter from 20 to 300 mm, Robust Concrete Core Machine, 3500 W with Holder, Core Drill, for Concrete, Brick, MarblePowerful Core Efficiency: Equipped with 3500W motor, this core drill effortlessly manages hole sizes from 0. 8 11. 8in 20 300mm. Whether you drill large or small holes, ensures efficient and accurate results every time. Wet and dry cutting capacity: our hole punch supports both dry and wet cutting mode. The dry cutting is ideal for fast drilling in dry rooms or in highly efficient scenarios, while wet cutting effectively reduces dust and heat and