Can be used in horizontal or vertical position. Complete with 3-Jaw chuck, 6 masking plates, & 10" faceplate. Designed for milling, drilling, jig boring, and many other shop applications. Hardened and ground 24 Position index plate (15° increments). 360° satin chrome graduated ring with 5 minute adjustable vernier plate insures accurate readings. Fast and simple indexing of: 2, 3, 4, 6, 8, 12 and 24 divisions. Also capable of "indirect indexing" using the worm drive mechanism. Chuck thru Hole Diameter: 2-15/32"