They allow independent adjustment of all caster and camber settings. Caster is the angle of Strut towards or away from the windshield and Camber is the angle of Strut towards or away from the engine. (Caster settings are positive towards and negative away; Camber settings are positive away and negative towards). Adjusting these settings will considerably improve the way your car will turn into corners flatter and be considerably more responsive to steering input overall.
They will turn your Ford Mustang into a real corner carver. The kit can be used on all suspension setups including most coil-over applications.