This rotary table set is all you will need for all your milling operations on mini mills like Taig or Sherline or small mills like Grizzly and PM. The rotary table has a 4" diameter table with 4 T slots and comes with a clamp set with 2 T nuts and studs and a set of clamp blocks. It has a 90-1 ratio on the handle so each revolution is 4 degrees, the handle has a dial that can be rotated to a zero position and is marked off in 4 segments of 1 degree with each line representing 2 seconds. There is a 360 degree scale around the perimeter of the main table with a metal pointer. The worm drive is on an eccentric and can be adjusted for minimum lash and continually over the life of the product, as well as the ability to rotate out of mesh so the table can be rotated freely by hand. Included in the set is a double sided dividing plate with hole patterns of 20,21,22,23,25,26,27,28 for all the most common divisions. Also included is the brass sector and adjustable spring loaded engagement pin. The set includes an adjustable tailstock for supporting longer parts when cutting gears or splines. A 3 1/8" diameter 3 jaw scroll chuck with special adapter plate, clamps and 2 sets of jaws rounds out this great set.