Milwaukee 1/4" Drive 1/4"F X 3/8"M Adapter is engineered to be a key component of the most versatile socket family. Featuring FOUR FLAT™ sides, this adapter is designed to prevent rolling and is compatible with wrenches for added convenience. The drive sizes are laser etched onto the adapter, ensuring easy-to-read visibility during use. Its chrome plating provides excellent corrosion and rust protection, making it durable for long-term use. Backed by a lifetime , this adapter delivers reliability and performance for mechanics and DIY enthusiasts alike. Model Number: 42-04-9110