The Jacobs 30233 18N Superchuck Ball Bearing 3/4" Chuck is a high-quality drill chuck designed for machining applications. Made of steel and featuring a tapered mount, this keyed chuck offers a maximum drill capacity and is ideal for securely holding and centering a drill bit during machining processes. With a length of 6.8 inches and a weight of 4.49 pounds, this durable chuck is a reliable tool for professionals in the CNC, metalworking, and manufacturing industries. Jacobs is a trusted brand known for producing precision machining accessories, making this ball bearing chuck a valuable addition to any workshop or tool collection.