A kimblewick is quite literally a d-ring with a short straight purchase at the top of the D. But uniquely functions as both a direct action and leverage bit using a curb strap. If the rein is attached to the top hook, it works as a direct action bit, exerting the same amount of pressure on the mouth as on the reins. If the rein is attached to the bottom hook, it works like a leverage bit, tilting the mouthpiece forward and applying pressure to the parts of the mouth curb and poll.
Available as the Butterfly mouthpiece this gives the bit additional tongue pressures, working on a reward scheme by reverting to the more comfortable position once the pressure from the rein is released.
soft very supple and pleasant in the mouth with a flexible steel core giving high security, particularly for sensitive or young horse
hard/firm - the material is firm and no-flexible whilst very pleasant in the mouth, for very strong or horses that lean. A less cumbersome alternative to Vulcanite.