PSI Woodworking CSC500K Barracuda Micro Key Lathe Chuck System Weighs only 1.2 pounds with a 2-1/8-inch outside diameter Includes step jaws, round jaws, and pin jaws Mounts to 3/4-inch-by-16 tpi & also adapts to 1-inch-by-8 tpi Holds workpiece from 5/8-to-2-inch inside hole diameter Holds dowell from 1/4-inch up to 1-1/2-inch outside diameter