A New Never Used Jacobs Brand Plain Bearing, Medium Duty, Key Type Drill Chuck. The Model is JCM 6283, 33BA. Capacity is 5/64"-1/2" and the T.I.R. is .004 Max at 1/2 Capacity. It is threaded for a 3/8-24 Mount (Mandrel) and comes with a K32 Key, also new. This chuck is older Jacobs stock and is made in the USA with quality steel. These chucks currently are being made in China and sell for considerably more. Selling at extremely modest price as this is older stock I've had for some time. Weight of item is approx. 1lb for shipping.