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Myler HBT Shank Ported Barrel MB 33 5" Bit

Our Price: $109.95 MSRP: $121.95 - You Save: $12.00
In Stock: 4+

The Low, Medium Wide Ported Barrel mouthpiece featured on the Myler HBT Shank MB 33 5" Ported Bit is the mildest Myler mouthpiece in terms of tongue pressure. Because this mouthpiece does not rotate onto the tongue and the port is wide, it applies little to no tongue pressure, working primarily off the bars, lips, chin and poll of the horse.

This is a Level 3 Myler Bit. Due to the high degree of tongue relief offered, this mouthpiece is appropriate for an experienced rider with a horse that has a trustworthy and consistent disposition and is trained to work off the leg and seat as well as hands.


  • Round Stainless Steel, Angled 5" HBT Shank - Mild Leverage
  • Patented Independent Swivel Cheek Purchase
  • Copper Inlay on Inside of Bars to Encourage Salivation
  • 7/16" Bars Shaped in Pronounced Curve to Allow Comfortable Swallowing
  • 1 1/2" Low, Medium Wide Port for Maximum Tongue Relief
  • Sweet Iron Mouthpiece- Oxidizes with Moisture, Releasing Sweet Taste


Full Cheek Length 5 3/4" 146mm
Shank Length 3" 76mm
Purchase Length 1 1/2" 38mm
Mouth Thickness 3/8" 10mm
Center Link 7/8" x 1/2" 22mm x 12mm
Rein Ring Diameter 1" 25mm

** Please Note: A Myler bit will normally measure 1/8” larger than the stated size because the Mylers believe that the bit should have at least 1/8” to 1/4” of bit on either side of the mouth.  

Designed with true Myler philosophy, this bit incorporates ergonomic design features and Independent Side Movement™ to better accommodate the natural anatomy of the horse's mouth and deliver clear, well-balanced cues from the rider.

For more information about the benefits of the Myler design, see the "Product Details" tab.

If you have any further questions regarding all of our bit options and what bit would best suit your horse, feel free to call one of our knowledgeable customer service representatives at 800-620-9145! Or, check out the Myler's book, The Level Best for Your Horse, a complete step-by-step guide to finding and using the right bit for your horse!

You can also check out our Bit Returns Program!

Shank Design and Leverage:

With a mild degree of leverage, this HBT shank bit provides an indirect curb rein action designed to be used with a curb strap attached to the purchase. The broken mouthpiece featured on this bit will apply slightly more pressure to the tongue than a traditional curb bit; however, the combination of the fixed cheek and fixed rein apply mild pressure to the bars of the mouth, chin and poll in the traditional curb bit fashion.

The Independent Swivel Cheek purchase is a patented Myler feature that allows the purchase of the bit to be independently attached to the mouthpiece and the shank.  When the rider engages one rein, the shank moves and the purchase has a slight swivel in order to prevent pressing directly into the horse's face as the bit moves below it.

The 5" shank length is well suited for trail riding, as the shorter shank makes grazing easier!

Ergonomic Design:

The unique curved bars of all Myler bits are ergonomically designed to accommodate the natural anatomy of the horse's mouth, wrapping the bars and lips instead of pinching as the mouthpiece rotates onto the tongue. This curved design also provides significantly more space for the horse's tongue underneath the bit, allowing the horse to comfortably swallow when the reins are not engaged.

The generously wide port of this mouthpiece allows ample room for the tongue to pass under the bit and swallow, and the medium 1 1/2" height applies little to no palate pressure. 

Independent Side Movement:

The barrel at the center of the mouthpiece is not a roller, but rather a bushing that allows each side of the bit to move independently of the other. When the rider engages one rein on a traditional bit, the entire mouthpiece moves, creating a confusing signal for the horse. In comparison, when the rider engages one fixed rein using a Myler bit with ISM, the rider lifts only one side of the bit, giving a very clear, precise signal to the horse. 

Myler Philosophy:

The creators of Myler Bits, Ron, Dale and Bob Myler, offer this philosophy behind each of their bits: The bit is a communication tool between the horse and rider, and in order to effectively communicate with the horse, the rider needs a bit which allows the horse to be relaxed. Keeping this in mind, the Myler Bitting System is based on the concept of tongue relief. Distributing tongue pressure more evenly than rival designs, Myler's unique designs offer varying degrees of tongue relief for the horse depending on his level of training and his disposition. These degrees are identified by the "Level" noted for each bit.

Other Items in Myler Level 3 Bits

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