Because of their increased wire range, just three "Performance +" Wire Connectors handle the work of seven standard connectors. O/B + replaces the orange, blue and gray wire nut style connectors, as well as 70% of the yellow wire nut and wing style connectors. R/Y + replaces both red and yellow wing style connectors. B/G + covers both the large blue and gray connectors. This simplifies selection of the right connector for a wide range of wiring jobs. There's also less invetory to manage and a better chance you'll have the connector you need to do every job.