Triple barrel drill bit with D-ring and flat faces Composition: D-ring drill bit with 90 mm rings and 7 mm thick barrels made of German silver (65% copper, 23% zinc, 12% nickel) a relaxing alloy and solid. Effect: D-ring bits provide better direction and are a great alternative to full cheek bits. The cheek pieces can be fixed in the passage of each ring for greater fixation in the horse’s mouth. Tips: Contrary to what it seems, it is not a strong action bite. It can be very effective for specific problems. It is perfect for horses that tend to retract their tongue during work and need a larger contact area. Size: 125 or 135 Maintenance tips: Rinse the bit after each use to prevent residue from depositing and prevent your horse from experiencing discomfort.