Includes: 1/2, 5/8, 3/4 Diameter Carbide Tooth Annular Cutters and 2 Ejector Pins in a Pouch. 1-3/8 Depth of Cut and 3/4 Inch Weldon Shank. Drill holes where tool steel canÕt. Makes holes faster and more accurately. Only cuts the circumference and cuts smoother with tighter tolerance. More cutting edges reduce loading and increase cutting speed. Burr free holes, no finishing required. Long lasting, made with brazed tungsten carbide teeth. Designed for cutting alloy steel, stainless steel and other high strength metals up to 45Rc. Applications: Truck frames, Heavy equipment frames, Manufacturing equipment, AR Wear-plate (up to 45Rc), Alloy steel pipes, Bolt holes in hard steel.