Metal AB Kimblewick Rubber With Tongue Port

Kimblewick - Kimberwick.

A kimblewick is a hanging D with a curb chain that acts like a pelham with a milder effect and is used with one rein.
This side piece has 2 slots for attaching a rein. The lower the rein, the greater the leverage and the sharper the bit.
The kimblewick is used in combination with a curb strap or curb chain.
The kimblewick gives the rider more control over the horse than a standard sidepiece.

Description rubber & plastic bits:

A rubber bit can be flexible, but also can contain a hard core. The flexible rubber bit has a steel wire running through is, so the bit can not break. The flexible bit is softer.
Black rubber has the disadvantage that if a horse has a drier mouth, the bit gets hot by friction and then can burn on the tongue. When a horse produces enough saliva, a rubber bit is the softer variant of a metal bit. The plastic variant is smoother and doesn’t have this problem.

Straight mouthpiece features:

A straight mouthpiece often has a sharper effect than a single or double jointed mouthpiece. The shape of the mouthpiece determines where the pressure will be in the mouth. A straight mouthpiece with tongue port puts more pressure on the layers and keeps the tongue free. The straighter and thicker the mouthpiece, the more pressure on the tongue.