The UNIBIT 1 1/8-1/2 from Field Tool Supply Co is a high-performance step drill bit designed for drilling holes ranging from 1/8 inch to 1/2 inch. Crafted from durable high-speed steel, this bit is engineered for longevity and efficiency. Its unique step design allows for smooth transitions between sizes, making it perfect for creating precise holes in various materials, including metal and plastic. Compatible with standard drill chucks, this UNIBIT is an essential tool for both professionals and DIY enthusiasts looking for versatility and reliability in their drilling tasks.