Herm. Sprenger WH Ultra D-Ring Bit

The central roller is designed to encourage the horse to chew and soften their jaw. By keeping the horse engaged with the bit, it helps prevent them from leaning or fixing their jaw, which ultimately promotes better relaxation through the topline.

D-ring cheekpieces offer more stability in the horse's mouth and prevent the bit from sliding side-to-side. This is particularly helpful for horses that tend to drift or need extra guidance when turning, as it provides a more direct, clear signal.

Yes, 16mm is considered a standard, versatile thickness that fits the majority of horses comfortably. It is substantial enough to be gentle on the bars of the mouth while still being thin enough to avoid overcrowding the oral cavity.

The WH Ultra is designed to improve communication rather than force control. Because it encourages the horse to relax and chew, it can help lighten the contact, but it is not a leverage bit intended to physically force a horse's head down.

While the WH Ultra is widely used for training, you should always check the current rulebook for your specific discipline and federation. Generally, double-jointed bits with rollers are permitted in most dressage levels, but specific cheekpiece styles can occasionally be restricted.