Shires Blue Sweet Iron Universal with Roller Link BitWe love this Shires Blue Sweet Iron Universal with Roller Link Bit because of the durable material and design. 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 center can help to soothe a fussy tongued horse. Bevel bit Blue Sweet Iron Roller Link Promotes head carriage Loose brass alloy discs in the center Allows mild leverage Increases