The bevel bit allows mild leverage and offers a little more control, promoting outline, head carriage and responsiveness. The loose brass alloy discs in the centre can help to soothe a fussy tongued horse. Mouthpiece thickness: 15mm. Cheek height: 55mm (4.5", 5"), 65mm (5.5"). Blue sweet iron mouthpieces oxidise easily to create warmth with a sweet taste which helps with bit acceptance and encourages salivation. Please note the blue colour will fade with use. The addition of brass alloy inserts produces a warm, more palatable bit. Stainless steel is used for the cheeks due to it being durable, easy to clean and resistance to rust.