Used to use one of these & whilst there very good for silvers fishing, i found they were the worst for carping, mainly due to the fact of the material, being hard plastic it makes it very easy for the rod to jump out, i found the other preston one like tipitinmick uses were the best as the rubber actually grips the rod to a certain extent, & when used with the preston butt rest with the rubber teeth, i've not had the rod pulled out yet, as i did before.