The UNIBIT 502 SET includes a comprehensive range of step drill bits designed for various drilling applications. Manufactured by Field Tool Supply Co, this set features multiple bits that accommodate hole sizes from small to large, ensuring versatility for any project. Each bit is crafted from high-speed steel for durability and long-lasting performance. The innovative step design allows for smooth drilling through metal, plastic, and wood. This set is perfect for professionals and DIY enthusiasts looking to enhance their toolkit with reliable and efficient drilling solutions.