One reason to have a slider. Preferably an automatic slider. Last week we traveled from South Central PA to western NY. About 20 miles from our destination we came upon a bridge signed for 12'6". Blind corner up the hill that we just came around and a blind corner down the hill under the low bridge. With the pullrite I was able to quickly back the trailer into a small gravel area beside the road and do a 180 and head back up the hill. With no slider it would have been much more difficult and taken longer. With a manual slider I would have been out in traffic trying to get the hitch slid back so I could maneuver. We don't always choose the messes we get into. But it is nice to have the proper equipment when you get into those messes.