Indexing Unit complete with 3-Jaw chuck & 6 masking plates. 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 a 5-minute adjustable vernier plate ensures accurate readings. Fast and simple indexing of 2, 3, 4,6, 8, 12, and 24 divisions. Can be used in horizontal or vertical position. For more information please refer to the specification chart picture.