This specially designed socket is needed to loosen and tighten the top strut nut when servicing the strut spring or strut cartridge. The socket is used with a 1/2" ratchet or breaker bar to turn the strut nut while holding the strut rod with the appropriate wrench. The socket fits 24 mm strut rod nuts found on many domestic FWD vehicles including 1988-96 Pontiac Grand Prix, 1988-98 Oldsmobile Cutlass Supreme, 1988-99 Chevrolet Lumina sedan, 1995-99 Chevrolet Monte Carlo, and 1988-96 Buick Regal.