Ivy Classic Swift Bore Step Drill Bit designed for enlarging holes from 3/4 inch to 1-3/8 inches in metal, wood, and plastic. Manufactured from high-speed steel for durability and smooth cutting performance, this step bit features clearly marked size increments and a 1/2-inch tri-lobe shank to help prevent slipping in the drill chuck. Ideal for electrical, HVAC, plumbing, automotive, and general fabrication applications.