The Precision Y U Shaped Triangle Screwdriver Magnetic Bit is engineered for use with power drills and is ideal for working with security screws that require a 1/4? bit. Featuring an inner cross design with three points, this magnetic bit ensures a precise and stable connection, preventing slippage during use. Made from high-quality materials for durability, it offers excellent performance when working with a variety of electronic, mechanical, and home improvement projects.