VEVOR Diamond Core Drilling Machine, 200 mm Drilling Diameter, 2-in-1 Handheld & Stand-Mount Dry and Wet Concrete Core Drill Rig with 4 Bits, 1000/2250 RPM 2-Speed, for Concrete Brick Stone, 1500WProduct Features Powerful & Fast Drilling This core drill boasts a robust 1500W motor and dual speed settings (1000 RPM 2250 RPM), delivering fast, efficient drilling. It handles holes up to 8 in (200 mm) with a 1 4 7 in threaded output shaft ideal for tough tasks Superior Hole Quality Our diamond core drilling machine features both wet and dry drilling. The wet drilling option flushes out debris and cools the bit with water, reducing dust and