3-piece set, 4-40 threaded ball and self-threading socket for 4-40 pushrods, 4-40 lock nut. 1/pkg. Includes: 1- swivel ball link (Black plastic, self-threading for 4-40 rod, 1" in overall length) 1- 4-40 metal threaded ball 1- 4-40 steel nut Requires: 4-40 threaded pushrod