Eggbutt Lock Up

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Width
Thickness

The Eggbutt cheekpiece prevents pinching of the lips and give a slightly more solid feel against the side of the face. It also prevents the bit being pulled through the mouth. The release is slower and also introduces some poll pressure.

The Lock Up snaffle removes the nut cracker action of the conventional snaffle, meaning it will bear less pressure on the horse's bars. The Lock Up is therefore a softer option, than a conventional snaffle, although it still applies tongue and bar pressure when the reins are taken up.

material-oxidisation

Eggbutt Lock Up
Breed Mouth Width 1 4
Bit Adjustment 2 Bit Width 3 4
Arab 115 mm (4½") 0 mm + 5 mm  120 mm (4¾")
Austrailian Stock Horse 120 mm (4¾")  125 mm (5")
American Quarter Horse 120 mm (4¾")  125 mm (5")
Thoroughbred (15h-15.3h) 120 mm (4¾")  125 mm (5")
Thoroughbred (16h+) 125 mm (5")  130 mm (5⅛")
Warmblood 125 mm (5")  130 mm (5⅛")
Large Warmblood 130 mm (5⅛")  135 mm (5¼")
Other MMS  MMS + 5 mm
Notes:
1 The measured width of a horse's mouth (from corner to corner with no wrinkles) rounded up to the nearest 5mm. These are typical values for the breed. MMS = Measured Mouth Size. Click here for more information on measuring your horse's mouth
2 Factors to be added to the measured width of a horse's mouth to ensure the bit width is calculated correctly. This varies depending on the mouthpiece and cheekpiece of the bit. Fixed cheek pieces do not require any additional width to be added to the measured width of the horse's mouth. For Barrel or Lock Up mouthpieces only add 5 mm as these mechanisms limit the nut cracker action.
3 The width of the bit for a optimal fit, taking into account its components and the width of the horse's mouth. If calculating a bit width based upon a previously purchased Bomber bit, please make sure all relevant adjustments for differences in cheek and mouth pieces are adhered too.
4 Measurements in inches are approximate.

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