Unibor EQ100 Diameter Annular Cutter Magnetic Drill, 7/16-Inch by 4-Inch Magnet dimensions 7-1/2-Inch x 4-Inch x 2-1/2-Inch. Magnet adhesion is 4000 lbs. Annular cutter capacity is up to 4-Inch in diameter. Variable Speed control in two gear ranges Change cutters in less than 10 seconds with the QuickHitch arbor system. With carrying case, safety strap, coolant system, and coolant.