Allows the mounting of a 4 Jaw Chuck, Face Plate, or any threaded spindle tool on your live center so that you can turn your workpiece held between 2 chucks, or face plates. Can be used to align your workpiece on a vaccume chuck. Allows spinning the workpiece to check the alignment. Works with Oneway, Robust, Jet, Powermatic, and Savannah Live Centers with 3/4" x 10 TPI threads. LIVE CENTER CHUCK ADAPTERS OLCA-XXXThread_Size:: 1"x8TPI1"X12TPI1-1/4"X8TPI LIVE CENTER CHUCK ADAPTERS LARGER SIZES & METRIC SIZES OLCA-XXXThread_Size:: 1-1/2"x8TPIM30x3.5M33x3.5 ©2022 Best Wood Tools All rights reserved. Please send questions and comments regarding this site to BestWoodTools Webmaster. Questions and comments regarding our products or orders should be sent to BestWoodTools Sales