Steelex M1077 4-Inch Rotary Table with Divider Plates Horizontal or Vertical Use, 4-5/16-Inch T-Slots 1:72 Ratio or 5 Degree Per Revolution, Vernier Scale Reads to 10 Seconds 3 dividing plates, sector arms Indexing pin/handle, mt no.1 spindle bore Coolant trough, 10mm locating key