The “keg” bushing is designed to give more progressive resistance and rebound than a barrel, but without the hard stop of a normal stepped bushing. The curved side profile provides extra meat while still fitting most bushing seats. Ideal for use on the board-side, especially if you’re looking for a softer-feeling setup without losing stability. Just think of it as a barrel, but with that thicky-thicc-thicc as Nelly would say. Only compatible with Tall-bushing trucks.