This is a Dynatrac HD balljoint set for most Dana 60 and Dynatrac Pro 60 knuckles, SKU DT BJK-D60A. A set is four balljoints: an upper and a lower for each side.
This set will not fit axles that run RCV axle shafts. If your Dana 60 has RCV shafts, Dynatrac makes a version with the needed clearance, DT BJK-D60A-RCV. Look at the shafts in your axle before you order.
Dynatrac designs these joints to be rebuilt rather than thrown away when they wear.
California Prop 65 warning: cancer and reproductive harm. See www.P65Warnings.ca.gov.