Like New--Excellent MINT Condition---I am a retired journeyman mold maker and the original owner of this precision drill chuck, it has been meticulously cared for and used very little.  It has a Jacobs JT1 - 1/2 inch dia. arbor. I am sure that you will be more than satisfied with the quality of this Precision Drill Chuck.

Keyless Drill Chuck (Albrecht Series 801) Model No. 30-J1 / 0-1/8" Capacity / 0-3mm Capacity / JT1 Mount

The Albrecht Chuck is "The World's Most Accurate Keyless Drill Chuck" and is being widely used today on the finest precision drilling machinery where close tolerance drilling is essential. All working parts are of alloy steel and expertly hardened making the Albrecht an ideal chuck for heavy duty drilling. The Albrecht Chuck is designed for both toolroom and production machinery where accuracy, gripping power and the keyless features are desired and is being widely used today on high accuracy drill presses, jigborers, milling machines and production drilling equipment.