Jacobs 3A CHUCK & K3 KEY

The JACOBS plain bearing chuck is the world's most widely used for medium or heavy-duty portable, bench, or floor mounted power tools. This industrial quality chuck, with fully hardened and ground working components, offers exceptionally high accuracy, gripping power, and durability. Both heavy and medium duty models are available in a wide range of capacities for use on threaded or taper mounted spindles.