Coronet Heeler Correction Mouth Bit with Copper Barrels Go to amazon.com Related posts The 10 best correction bits FeatureStainless steel Heeler Correction 5 inch mouth with copper barrelsBlack iron shanksCheeks swivel independently DescriptionHeeler Correction Mouth Western Bit with Copper Barrels This correction bit comes with 7 1/2 antiqued shanks. Mouth Size: 5.