YOU ARE BUYING EIGHT 1/2" HEIMS AND NUTS (4 LH & 4 RH).

This is a perfect and inexpense way to replace your heims on your 4 link.

These standard rod ends are a general purpose, two piece, standard duty rod end.

They have a carbon steel body, hardened ball, and metal to metal contact. 

Shank and hole are the same size. 

Applications: Clutch, Brake, Steering Linkages, & Suspension Components on Moderate Horsepower Applications. 

ASSEMBLY TIP: 
To ease assembly, be sure to run a tap or die through the threads on chrome plated fasteners and apply an anti-seize compound to prevent galling of the threads.