Gibraltar SC-BDKR/S Bass Drum Key Rod 7/32-Inch, Pack of 4 Fits most standard 22" bass drums Gibraltar GBL SC-BDKR/S Bass Drum Key Rods fit most standard 22" bass drums Set of 4 Gibraltar GBL SC-BDKR/S Bass Drum Key Rods fit most standard 22" bass drums Set of 4