Myler Stainless Steel 5" HBT Shank, MB 27PB Correctional Low Ported Barrel, Level 2-3 The MB 27PB is a Myler correctional mouthpiece, which is a ported mouthpiece that collapses on to the outer lip and bars, and rotates on to the tongue. The port, although narrow and somewhat low, allows room for the horse’s tongue to pass under the bit. When the reins are engaged and the mouthpiece rotates on to the tongue, it applies two concentrated points of pressure on the tongue for quick control. Because this port is only 1 ¼" high, it will apply little to no palate pressure. Sweet iron mouthpiece oxidizes and encourages salivation. Independent Side Movement Sweet Iron Mouthpiece Curved mouthpiece Copper Inlay Notes: For more tongue relief, see the MB 41PB. For the same mouthpiece without Independent Side Movement, see the MB 27LP. For a non-correctional version offering more tongue relief, see the MB 43LP. The 5" HBT shank is stainless steel and slightly curved back, with a flat-top purchase and a rein ring. The mouthpiece has a fixed attachment. The HBT shank has the patented Independent Swivel Cheek, where the purchase, mouthpiece and shank all move independently of each other. The purchase is slightly angled away from the cheek to avoid rubbing. It has an indirect (curb) rein action designed to be used with a curb strap which attaches to the purchase. The HBT shank uses the combination of the fixed cheek and fixed rein to apply pressure to the mouth, chin and poll. Action: Indirect Discipline: Western Degree of Leverage: Mild Notes: The HBT is well suited to trail riding as the shorter shank makes grazing easier for the horse.