26/07/2024
A little "bit" of knowledge for the day. . and make sure your curb chain is properly adjusted :)
A slotted Kimberwick might be the most versatile bit but they have gone out of style. This bit has three rein positions. The "A" rein placement is on the arc inside where the slots are located. The reins slide up the arc as rein pressure is increased. When the reins are relaxed with very light contact, the reins slide to the bottom of the arc and when contact is first increased, the bit starts to provide some leverage and thus light poll pressure. However, as the reins slide up the arc from increased rein pressure, the amount of leverage decreases to zero. This results in very forgiving bit action. This rein placement acts like a clutch that automatically slips so as to release the leverage pressure.
The lower "B" slot rein placement offers consistent low leverage due to the short shank (distance from the mouthpiece down to the "B" slot location).
The top "C" slot is at the mouth and acts with no leverage. If a Kimberwick has a snaffle mouth, and reins are attached at the "C" slot, the Kimberwick acts just like a snaffle.
There are many mouthpiece options for Kimberwicks. There are all kinds of snaffle mouthpieces available, some with rollers or french links, rubber coated etc.. With a snaffle mouth and reins attached at "C", the design acts somewhat like a full cheek bit due to the design of the arc shank. There are straight Mulllen mouths available with many material variations such as steel, hard and soft synthetic material or different metals. Mouthpieces with ports are also available.
The Kimberwick's versatility includes using variations on the chin chain (shown) or strap. These can vary from a kind soft leather chin strap, to a usual medium width chain with flat links, or to a narrow metal chain with small links that can be nasty.
All these variations in different combinations of rein placement, mouthpiece design and chin chain or strap make this, in my experience, the most versatile bit available. If you know of another that is more versatile, please put a picture in the comments.
Lastly, you can also use or teach the use of double reins using a Kimberwick with one set of reins at the bit slot "C" as the "bridoon" and the second reins attached at slot "B" for the "leverage bit". It's not a real deal double bridle, but for teaching it works and it is quite idiot and abuse proof due to the low leverage and if the mouthpiece is forgiving. Having largely gone out of fashion, Kimberwicks are very affordable used.