Our set includes seven drill bits, titanium-coated for optimal performance in wood, plastics, soft metals, and drywall. The set includes various sizes: 1/32, 3/64, 1/16, 5/64, 3/32, 7/64, and 1/8 inches. Crafted from high-grade stainless steel and finished with a high-quality titanium coating, these accessories are designed for enhanced durability. Each bit is conveniently standardized to a 1/8" shank diameter, allowing for versatile use across multiple drilling diameters. For optimal results, we recommend using these drill bits with Dremel rotary tools capable of achieving speeds of 20,000 RPM or higher.