Trust Sweet Iron Dee Bit Waterford
The D-ring cheekpiece consists of two rings that are shaped like a D. As the rings cannot move back and forth, this cheekpiece offers more stability but also lets the rein aids come through more directly. The D-shape gives more side pressure (against the cheek), making steering easier.
The Waterford mouthpiece consists of a series of elliptically shaped links. This mouthpiece is usually used with horses that are heavy in the hand and have difficulty relaxing the jaw.