Machinists and workshop folks, this Vertex dividing plate set is exactly what you need to take your rotary table work to the next level. Designed specifically for Vertex 4-inch or 6-inch rotary tables, this 3-piece set includes everything required for precise indexing and dividing operations. You get three index plates (A, B, and C) that cover a wide range of divisions: Plate A handles 15, 16, 17, 18, 19, and 20 divisions; Plate B covers 21, 23, 27, 29, 31, and 33; Plate C takes care of 37, 39, 41, 43, 47, and 49 divisions. The set comes complete with a crank handle, three screws, sector arms, and U washers - basically everything you need to get set up and working right out of the box. It's compatible with Pro-Series rotary tables, and the quality matches what you'd expect from Vertex equipment. Whether you're machining gears, cutting flutes, creating bolt patterns, or any operation that requires precise angular divisions, these plates give you the accuracy and repeatability that manual methods just can't match. The plates are well-made with clean, precise holes that engage smoothly with the indexing mechanism. If you do any kind of milling work that involves circular patterns or precise angular spacing, this dividing set will quickly become one of your most-used accessories.