This bit is made out of stainless steel
The Kimblewick is a fixed cheek bit that is often used on horses and ponies that prove a little too strong in a snaffle; it is also often used by children to help them have some control should they need it. There are two main types of kimblewick, the slotted version that has two fixed rein slots in the cheek piece, or the plain cheek where the reins are attached to the cheek as you would a snaffle. Both types of Kimblewicks are used with a curb chain. The hanging cheek part if the bit from the cheek slot to the mouthpiece uses poll pressure and lip pressure, and various pressures in the mouth depending on the mouthpiece. When the rein is used, the curb chain should come into play, but not straight away, there should be some give in the rein before the curb chain tightens.
The Cambridge Mouthpiece
The Cambridge mouth is a very mild bit; it is an unvarying mouthpiece, which means the pressure on the mouth doesnt change very much, as it is a fixed mouthpiece. This mouthpiece is super alternative to the straight bar for horses with a larger tongue, horses that are likely to have larger tongues are for e.g., Irish Draft x or the Dutch Warmblood. The bit puts pressure on the tongue and lips (corner of the mouth), it does use slight pressure on the bars depending on the size of your horses tongue, more than that of a Mullen mouth. This bit is very useful for those horses that have a very soft mouth and dont like complicated mouthpieces, it may also be useful for horses that back off the contact and need that extra bit of confidence in the bit.
This mouthpiece would not be suitable if your horse leans on the bit or if they tend to take hold of the bit.