elitefts E-Series Core BlasterE Series Core Blaster Every so often a piece of equipment comes along that truly warrants a lot of buzz, and for good reason. This is one such example. The E Series Core Blaster gives you the benefit of a rotational core trainer, but with much more flexibility. This model does not have a base, as many other rotational core devices do. Instead, the E Series Core Blaster simply slides into any Olympic plate or Prowler, effectively creating a stable base