Check the listing for details. New 2" Lathe Ball Turning Attachment with Size Scale Machine Tools Radius ball. Condition: New. Listed at 66.99 USD. This fits straight onto the cross slide of your Myford & similar size lathe machine.Comes with a 1 Indexable TNMG16 Insert for best turning finish and results with 6 edges of this single insert to use while working.The insert tip should be adjusted to the given reading for achieving the desired size of the ball.Pls note the scale is a radius reading, which means that for any set parameter on this scale, you will get double of it as the ball diameter. Example- If you set the scale at a measurement of 15 mm, you will get a ball size of diameter 30 mm. The scale calibration is provided both in Imperial as well as Metric standards.Bearing Base for a Smooth Rotation of the Cutting Arm through the handleA 2" ball turning attachment likely refers to a tool or accessory used in machining or metalworking. It is designed to facilitate the turning or shaping of workpieces to create spherical surfaces with a diameter of 2 inches. This attachment is commonly used on lathes for precision machining task