Sweet iron will rust when it comes into contact with (air) humidity; the surface rust tastes sweet and naturally stimulates the saliva production. This will cause the horse to salivate more which in turn encourages better acceptance of the bit. The rusting process (oxidation) changes the blue colour of the TRUST-bit to a brownish-grey.

A loose ring snaffle is a basic bit with loose movable bit rings and is therefore quite loose in the mouth. It is important that the loose ring is not too narrow, otherwise a skin from the corners of the mouth can get in between. If your horse does have problems with this, you can use rubber bit rings if necessary. A loose ring snaffle is a good basic bit, suitable for many horses and riders.

A single jointed bit has a hinge point in the middle that puts pressure on the lips, layers and sides of the tongue. A single jointed bit squeezes the tongue slightly under pressure and puts less pressure on the tongue.