For cutting and polishing round star stones. Set
consists of one cup holder and three
interchangeable copper inserts. Holder fits 1/2"
shaft, 20 RH or 24 RH thread. Inserts are
available in three sizes. Small 1/2" dap, medium
3/4" dap, and large 1" dap. Specify thread size of
holder. Inserts also available in lead.