PSI Woodworking LCM18X Wood Lathe 3-Jaw Micro Chuck Brand PSI Woodworking Material Metal Assembled Diameter 2.5 Inches Included Components Tightening Levers(2), Chuck, Spindle Adaptor, Instructions, Jaws(3) Dimensions: 2.7' 2.4' 3.2' Self-centering 3-jaw micro chuck is ideal for holding small woodturning projects and drilling Reversible step jaws can hold work-piece from the inside or outside Inside hold from 3/4" to 2-1/2"; Outside hold up to 1-1/4" Pre-threaded to 1" x 8tpi and includes a 3/4" x 16tpi lathe headstock spindle adaptor Diameter is 2-1/2" and weighs 1. 20 lbs; Includes (2) Tightening Levers