16/03/2026
This is fascinating and wonderful that there is so much choice with subtle differences between the same concept of bit action. But also does highlight that you have to do your homework for the more sensitive horses
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✨️ Not all Lock ups are created equally.
The lock up is one of my preferred bits for horses. They are very versatile at the same time as being effecting for the horse.
The main principle is that the bit sits loosely in the mouth until rein tension is taken up or the horse becomes strong and it locks into place.
1 - Fager Lilly - single jointed lock up which locks on both planes. (Down and backwards).
As with all fager bits I find them very straight cannoned and so create a V shape in the mouth. This defeats the object of having the lock up as it does limit the pinch (nutcracker) to the lips and tongue you can see here that jt still has a lot of just that.
2 - Aster Golden locking snaffle - pretty much the same as the fager. Very straight cannoned but does have a curve for the tongue to fit in which again is defeating the object as it still has an element of pinch even if it is limited.
3- Bombers Ultra comfy lock up - this locks on 2 planes and is much more curved.
The curve and the slight upwards curve gives generous tongue room. The forward deviation gives ample bar and lip relief.
The primary pressure point is the tongue but its a 4/10.
I find this one the most useful for very sensitive mouths which prefer a stable contact. The locking joint allows for communication aids as well as a bit more respect from the horse.
I find that it also has a lifting effect so horses which tend to over bend, pull down are more sat up with this.
4 - Bombers Ultra comfy elliptical lock up
The Ultra-Comfy shape follows the contour of the horse’s tongue. Locked on both planes to maintain the correct angle over the tongue even when the reins are taken up, it retains the individual lateral aids.
5 - stubben anatomical easy control
Only locks on one plane (backwards) so that it is flexible in the mouth under no rein pressure and locks into place with rein pressure or when the horse gets strong on the bit.
The curved shape follows the contour of the horses mouth giving more tongue, lip and bar relief.
I find this one useful for horses which are sensitive on the bars and lips but still need a bit of tongue pressure to aid with flexion at the poll to bring the head into place. Its a nice stable bit and most horses take it well.
6 - Sprenger Max control (also applies to stubben Easy control with no curve)
Only locks on one plane. Only when the rider applies a stronger rein or the horse pulls strongly - the mouthpiece blocks and briefly forms a mullen mouth. This effect only sets in gently, but enables precise communication. When the tension on the bit is released the bit will release in the mouth. The mullen has a stronger effect on the tongue, bars and lips.
Have you tried one before?