How it's works: When mounted onto a rotary table, which is a precision workholding device that allows for precise positioning of workpieces, the dividing plate helps in accurately dividing the rotation of the table into equal parts. This division is crucial for tasks like cutting gears, splines, or other components that require precise angular spacing or indexing. Tools Specification: Dividing Plates Set for HV4 /HV6 Rotary Table: Set Includes: 3 x Indexing Dividing Plate and accessories. Diameter of the Plates is 100 mm. Centre Hole of the Plate is 21 mm. Thickness 7 mm Plate 1 – 15, 16, 17, 18, 19, 20 Plate 2 – 21, 23, 27, 29, 31, 33 Plate 3 – 37, 39, 41, 43, 47, 49 Dividing Plates Set for HV8 /HV10/ HV12/ HV14 Rotary Table: Set Includes: 2 x Indexing Dividing Plate and accessories. Diameter of the plate is 7" and its thickness is 0.47 " Inches (12 mm) approx. All required accessories are included as photograph. No manual is included, please note. Plate A - 28, 32, 37, 39, 43, 46, 49, 53, 59 Plate B - 63, 69, 73, 79, 83, 89, 93, 99