Installation instructions and parts list for the later 6800 10" QCGB. Tumbler is adjusted and locked into position by loosening then tightening a clamping nut on a stud. The model number is the same whether the lathe has a 5/8" or a 3/4" dia. leadscrew. Leadscrews are shown on parts list but do not actually come with a kit. Original leadscrew requires modification.