Greenlee 34401C 1/2-Inch XT Cobalt Step BitThe Greenlee 34401C XT Cobalt Step Bit is designed for precision drilling in various materials, offering sizes from 1 8 inch to 1 2 inch. Crafted with steam oxide and cobalt high speed steel, this bit ensures durability and a long service life, making it suitable for both professional electricians and DIY enthusiasts. Ideal for creating multiple hole sizes without changing bits, it's perfect for electrical panels and sheet metal work.