The difference between the two types of bit is that the snaffle is a non-leverage bit and the curb is a leverage bit. Snaffle Bits and Curb Bits: What Does That Mean? On a snaffle bit, the rein attaches directly to the mouthpiece.
For the snaffle bit, the hands are brought more toward the horse’s hip. Most people can put steady pressure on the snaffle bit rein, and the horse will likely give to it at some point. Conversely, if you put steady pressure on a hackamore, the horse is likely to learn to push on it.
An English Pelham bit somewhat mimics the action of the bridoon (small snaffle bit) and weymouth (curb) bit combination used on a 'double bridle.' A Pelham may be used when a horse cannot hold the two bits comfortably, or for convenience.
Knowing how the snaffle bit works is helpful in... MORE developing effective rein aids, and avoid either being ineffectual or too hard on your horse's mouth. Although the basic action of most snaffle bits is the same, it sometimes takes trying a few different bits to find one your horse is comfortable with.
In addition to the one-ear bridle, you can buy a two-ear bridle that has an additional ring or slit for the other ear. English bridles have both browbands and nosebands, while Western bridles with browbands do not typically have nosebands.
Weymouth Bits and Bradoon from Horse tack Company. A bradoon is a snaffle bit designed specifically for use in the double bridle. Bradoons should be 1/2" wider than the weymouth.