IKLF competition rule. Competition Format & Structure category.
For double kettlebell events, the total weight per rep is the combined weight of both kettlebells. For example, with 2x20kg bells: weight per rep = 40kg. Base Volume = 40 x 40 = 1,600kg. The formula is the same; the 'total weight of kettlebell(s)' includes both bells.
See the interactive comparison on KETTLEBELL MONSTER™ for filterable views and more detail.