They work with any speed loader, Comp III for K and L frame and all SLV speed loaders in any configuration, KLN SW, Ruger, whatever you have. The manufacturer only needs to know what you are using. Modifications to the diameter of the speed loader affect the design. Modifications to the length, ie "facing the speed loaders" does not. This applies to the ICORE holders as well as the IDPA holders. Look here.