Our 10230B Silver and Deming Drill-Bit Set lets you drill holes in plastic, aluminum, copper, wood, stainless steel, and many other materials and can be used for industrial purposes or personal projects. Each drill bit features a unique black-and-gold dual finish that easily holds lubricant for a smoother drilling experience and offers maximum corrosion resistance. With a premium high-speed steel construction, the bits can withstand heavy impacts and pressure. Our drill bits have 1/2-inch reduced shanks and Tri-flatted ends to fit securely into your power tools and help eliminate slips. They offer a 135-degree split-point design to increase cutting speed and a self-centering drill feature that helps to prevent the bits from walking or wobbling while in use. This drilling set comes with a sturdy carrying case for easy storage and transport and includes bits in the following sizes: 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", and 1". Whether you need an auto-centering drill bit or new bits for your power tools on the jobsite, NEIKO PRO has your back with our durable, dependable, and strong tools.