The bit on the bridle of a horse, is attached to the reins. The rider holds the reins and thus can control the horse. For example if you pull on the reins, the horse slows down or stops, because of the pressure that is placed on the horse's mouth. Likewise if you pull to the left or right with the rein (this is in English riding) the horse will turn in the direction you are pulling.
It's called a "bit"; hence the expression "bit between your teeth".
Its a colour check it out on google images type in briddle horses
the bit is placed close to the gum in the back of there mouth's your having trouble getting the horse to take the bit then... there is a slot between the horse's teeth just stick your thumb in the slot while your holding the bridle with the bit.
To control my horse when I mount it .
the saddle and bridle start with a halter and bit-less briddle
Reins,briddle mounts
well the essentials are jeans, boots, a saddle, a saddle pad, a briddle with an apropiate bit,and of coarse a horse.
a pelham is a bit used on horses its a very harsh bit though
A bit is used for control while riding it is attached to a head stall which goes around the horses head. The reins get attached to the bit. When choosing a bit make sure it fits the horses mouth right.
bUY IT IN THE SHOPS
Nicholas Briddle
I think this is talking about the 'bit' which goes in the horses mouth and is used via the reins to control the horse's movement.