Medium Ring Gag – Buster Roller Bit Sweet Iron - 135mmMedium Ring Gag Buster Roller Bit SWEET IRON 135mm Mouthpiece: Double jointed with center barrel (Buster Roller) Cheek Style: Medium ring gag for moderate leverage and poll pressure. Sweet Iron Composition: The blue sweet iron oxidizes with use, promotes natural salivation, helping to keep the horse's mouth soft and responsive. Action: Fast response, added tongue pressure, moderate lift Best For: Strong or unbalanced horses Polo Eventing Fast paced