The Jacobs USA 3B Heavy Duty Drill Chuck has a 1/8-5/8 capacity and a 3/4" shank size, making it suitable for a wide range of drilling applications. This high-quality steel chuck features a threaded design and a maximum drill capacity, ensuring precision and reliability in machining processes. The Jacobs brand is known for its durability and performance in the industry, making this drill chuck a practical and efficient tool for professionals in CNC, metalworking, and manufacturing.