Blue Steel Double Jointed with Brass Rollers Full Cheek Gag Bit

A Full Cheek Gag combines the running gag action (sliding cheekpieces that lift and rotate the bit in the mouth) with the long cheek bars of a Full Cheek, offering both a strong balancing/head-raising effect and lateral steering support in one bit.

Design

• Like a standard running gag, the rings have holes through which specially adapted rounded leather or rope gag cheekpieces are threaded, running from the bridle's headpiece down through the bit ring to a smaller ring where the reins attach.
• Layered onto this is the Full Cheek element: narrow arms extending above and below the rings, positioned to prevent unwanted sliding within the mouth and to reinforce turning aids.
• When rein pressure is applied, the bit slides upward along the gag cheekpieces and rotates slightly in the mouth — the classic gag action — while the cheek bars simultaneously resist lateral movement and support steering.
• Mouthpieces vary (single-jointed for a nutcracker action, roller, high port, twisted, etc.), and severity is also influenced by the size of the rings — larger rings mean a stronger gag action.

Function

• Balance and rebalancing: The core gag action works on the horse's balance — as the bit slides up and applies poll and mouth-corner pressure, it encourages the horse to rebalance and shift weight back onto the hindquarters, discouraging leaning on the forehand.
• Combined balance and direction: This bit combines the gag action and the Full Cheek action, meaning it addresses both balance/rebalancing and directional control in a single mouthpiece — useful when a horse needs both at once.
• Reinforced steering: The cheek bars add the same lateral guidance as a standalone Full Cheek, helping keep the shoulders aligned and supporting clear turning cues even while the gag action is engaged.
• Reduced sliding/mouth stability: The full cheek arms help prevent the bit from moving excessively within the mouth, giving a steadier, more framed feel than a plain gag ring alone.
• No upper limit on lift: As with any gag, there's no built-in limit to how far the bit can rise in the mouth — strong or sustained rein pressure can lift it substantially, so it must be used thoughtfully.

What it's good for

• Strong horses that lean on the forehand or get heavy in fast work: The gag action encourages rebalancing and discourages leaning, useful for horses that pull or become unbalanced at speed.
• Horses that also need extra steering support: The Full Cheek element makes this a good choice for a horse that both needs rebalancing help and struggles with straightness or drifting through turns — addressing both issues without needing two separate bits.
• Fast, forward disciplines: Commonly used in cross-country, showjumping, and other jumping/eventing contexts where quick rebalancing and directional control both matter, especially in open, fast-paced work.
• Use with two reins or bit loops: As with other gags, it's often recommended with two reins (or bit loops/converters), giving the rider the option to use plain snaffle-style pressure most of the time and engage the gag action only when needed.

A note on use

• Because it combines two strong mechanisms (gag leverage plus full cheek lateral pressure), it's considered a more advanced, stronger bit — best suited to experienced riders with good timing and independent hands.
• Bit keepers are advisable to keep the full cheek arms stable and reduce snagging risk.

Competition legality

Like other gag bits, the Full Cheek Gag is generally not FEI dressage-legal, and is instead used in disciplines like eventing (cross-country), showjumping, and some hunting contexts where stronger control is permitted.

Summary

The Full Cheek Gag merges gag-style rebalancing action with Full Cheek steering support, making it a strong, dual-purpose option for horses that lean, rush, or get strong in fast work while also needing help with directional control — best reserved for experienced riders in disciplines like eventing and showjumping.

This describes a mouthpiece style and material combination rather than a single "type" of bit — it refers to features that can be applied to almost any cheekpiece design (loose-ring, D-ring, eggbutt, or even a gag), so the ring/cheek style would still determine the bit's overall lateral action. But the mouthpiece itself — double-jointed, blue steel, with brass rollers — has specific, well-defined functions.

Breaking down the features

• Double-jointed mouthpiece:
• Consists of three parts rather than a single hinge — two outer sections plus a center link/piece.
• The center piece lies flatter across the tongue than a single joint would, eliminating the sharp "nutcracker" action that a single-jointed mouthpiece creates (where the two halves fold upward into a V-shape and can pinch the tongue and jab the roof of the mouth).
• Distributes pressure more evenly across the tongue and bars, generally making it a more comfortable, gentler mouthpiece profile than a single-jointed bit.
• The thicker the center portion, the more surface-area pressure lands on the tongue specifically.
• Blue steel material:
• Blue steel is a technologically advanced version of traditional sweet iron (black steel).
• It oxidizes faster and more easily than standard sweet iron, developing a light surface rust when exposed to air, humidity, and saliva.
• This surface rust has a naturally sweet taste, which stimulates the horse's saliva production and encourages better bit acceptance — horses tend to mouth, chew, and salivate more, and often relax their jaw more readily as a result.
• The rust is cosmetic and easily wiped off with a damp cloth; it's considered a normal, expected part of how the metal functions rather than a defect.
• Brass rollers:
• Small rollers or discs set into the mouthpiece (usually at the center joint) that rotate freely, giving the horse something to "play with" using its tongue.
• This can help keep a fidgety or mouthy horse's mouth quieter and more occupied/settled, redirecting nervous tongue movement into a small, contained motion rather than more disruptive tongue or jaw evasions.
• Some brass roller designs, particularly ring-style rollers at the joint, can also increase tongue activity and salivation further, reinforcing the sweet-iron effect.
• The brass material itself, similar to copper, is often chosen because horses tend to find its taste and warmth pleasant, adding to overall acceptance.

What it's good for

• Horses that are mouthy, tense in the jaw, or resistant to accepting contact: The combination of a gentler double-jointed profile, a taste that encourages salivation, and rollers to occupy the tongue is specifically aimed at improving relaxation and acceptance of the bit.
• Horses that grind, clamp, or fuss with a plainer mouthpiece: The rollers give restless tongues something constructive to do, which can reduce fidgeting or tension-related evasions.
• Riders wanting a milder feel than a single-jointed bit: The double joint's flatter profile avoids the sharper nutcracker action, making it a comfortable step up from a basic single-jointed snaffle.
• General schooling and everyday riding: This mouthpiece style is popular across many disciplines specifically because it's seen as a comfort-focused, acceptance-boosting design rather than a stronger or more corrective one.

A note on classification

• Because "double-jointed blue steel with brass rollers" describes the mouthpiece and material, not the cheek/ring style, its overall action still depends heavily on what kind of cheek it's paired with — a loose-ring version will behave differently (softer, more mobile) than the same mouthpiece on a D-ring, Full Cheek, or gag bit (which would add lateral support or leverage on top of the mouthpiece's own gentle action).
• This mouthpiece and material combination is generally considered mild to moderate, focused on comfort and acceptance rather than added control — any extra severity would come from the cheek style it's built into, not from this mouthpiece itself.

Summary

A double-jointed blue steel mouthpiece with brass rollers combines three comfort- and acceptance-focused features: a flatter, gentler double joint (avoiding the nutcracker effect), blue steel's natural sweet taste (encouraging salivation and relaxation), and rollers (giving a fidgety tongue something to do) — making it a popular, mild-to-moderate mouthpiece choice for horses that need encouragement to relax, salivate, and accept contact comfortably, regardless of which cheek/ring style it's built onto.