IN hand you can use them the top to nudge into the horses neck, if they are getting too close to you trotting and encourage themto turn, and i lay mine by the side of my D to get her to sort her quarters out. if the horse is playing up badly, you are allowed to use the cane.
But. I dont like it, their solid, not like usual whips. I was at a show last week, and a person in the line up next to me (wearing a tracksuit top

not that thats related) was swinging hers by the string and the caner part kept swinging up and hitting the horse hard over the head, she also kept yanking the horse in the mouth with the very tight joiner and her family were sitting swearing about the pony at the sidelines...somehow they got placed well and not send out- the pony deserved the placing, but the handler didnt.