This is the VERTEX DP-1 dividing plate set, consisting of 3 plates, crank handle, screws, sector and u washer. A plate is 15/16/17/18/19/20; B plate is 21/23/27/29/31/33; and C plate is 37/39/41/43/47/49. Compatible with our models HV-4/HV-6/ATRT-004/ATRT-006; have been told by some customers that they will work with non-VERTEX tables as well. We offer flat rate shipping via USPS Priority on this set to anywhere in the USA. We stock other sizes of dividing plates, tail stocks, rotary tables, chucks and dividing heads available as well in the VERTEX line, so if you are looking for these, we should be able to help you out! We are the TOOLSUPERMARKET: blessed to serve tens of thousands of satisfied customers in our 39+ year in business. Try us today for your next tool need; you will be glad you did!