8 excellent used Quackenbush fluid chucks for your drilling applications. The top 5 are a Quackenbush 111094/Magnavon 15614. They are 3/8-24 female spud and accept 9/6-8 cutters. The bottom 3 don't have part numbers but are a 9/16-18 male thread and accept 9/16-18 cutters also. All spin free. FREE SHIPPING!