Korsteel Rubber Jointed Tom Thumb Pelham BitWe love the Korsteel Rubber Jointed Tom Thumb Pelham Bit because the thicker mouthpiece is softer on the corners and the bars of the mouth, and the pressure created by the reins is spread over a larger surface area. Pelham bit Combines the function of a snaffle and the action of a curb bit The top rein provides snaffle pressure to the tongue and corners of the mouth, while the bottom rein increases leverage and curb chain pressure Hard rubber