Includes four(4) self-centering Jaw sets to hold Round and Square Stock for turning, pre-threaded for 1" x 8 tpi, and has an adapter for 3/4" x 16 tpi Spindles * Includes #1 Step Jaws- for dowels: 1/32" to 1-1/2", holes: 11/16"to 3-1/8" * Includes #2 Round Jaws, for dowels:1-1/2" to 2-7/8", holes: 2" to 3-1/2" * Includes #3 Round Jaws, external grip 3-1/16" - 4-1/2" * Includes Pin jaws which hold inside holes 1" - 2-1/2", and a screw chuck