So a few photographs get leaked of Callaway’s top secret driver which is slated to be released this winter and features a sliding weight channel across the back of the head to better control ball shape and spin. So what does TM do-they rush to market their version and call it SLDR obviously to beat Callaway to the punch. Too bad Callaway owns the trademark “Slider” hence the goofy abbreviation. Will be interesting to see what the new name will be