This fine quality chuck is ideal for all small and mini lathes. It comes with 2 sets of jaws for inside and outside turning and a chuck key. This chuck also bolts directly to our fixture plate part # 112005 for mounting on our 6" rotary table part # 100242. These tools make your life easy as all the components fit precisely together with no modifications necessary. The chuck is designed to accept either 8 mm or 5/16 allen head bolts about 2" long. If mounting to our adapter plate # 112005, use 8mm X 1.25 bolts.