This US PRO Tools 18-piece socket set is designed for the removal and replacement of shock absorbers. It allows for the removal of the top suspension nut by holding the strut piston, preventing rotation while the nut is turned. The go-through design of the socket and ratchet enables an extension to pass through the middle, making it an efficient tool for automotive repairs. This set is intended for use with a 1/2" Sq drive ratchet or T-bar.