The 12 pc. BLACK & GOLD IMPACT READY Metal Drill Bit Set is rust-resistant, with a strong tapered core design that helps resist breakage. Made of heavy-duty, high-speed steel for drilling into a variety of materials including plastic, wood, and metal, each bit features a 1/4 in. hex shank designed to resist axial torque with impact drivers. The 135° split point tip design on 1/8 in. and larger sizes helps reduce walking. The 12 pc. set comes in a durable ToughCase+ system which is designed to optimize storage space and keep your bits organized. The patented bit-bar design allows for easy bit removal, with a clear lid so you can see what's inside at a glance.