P-232 Crank shaft extender – ORIGINAL. 1/2 inch stock diameter and thread size: 3/8 x 20. Length: 2 inches (see photo) – Disregard last two printed lines in photo when ordering. – – – NOTE: Also AVAILABLE 2″ EXTENDER thread size 1/4 x 28 on 3/8″ shaft, and another 1″ extender thread size 1/4 x 28 on 5/16″ shaft. (Inquire if you need either of these) [See P-314 for more extenders.]