The Full Cheek has two vertical rods on a fixed ring. These straight bars (toggles) provide more side pressure (against the cheek), making steering easier.

The ring of the Full Cheek is smaller than that of the D-shaped bit with less leverage effect as a result. The upper toggles of the TRUST Full Cheek are slightly curved outwards so that they do not get stuck under the noseband.

Sweet iron will rust when in contact with (air) humidity. The surface rust tastes sweet and naturally stimulates the saliva production. This will cause the horse to salivate more which will encourage the horse to take more contact. 

The process of rusting (oxidation) changes the blue colour of the Trust-bit to a brownish-grey. A sweet iron but will develop an orange-brown rust layer on the mouthpiece if it is temporarily not used. This is easily removes by wiping it off with a damp cloth.