The Trust Pony Sweet Iron Elliptical Eggbutt Snaffle has a double-jointed mouthpiece with an ergonomically shaped central lozenge.

It has been specially designed to fit pony mouths comfortably, with a 12mm diameter mouthpiece and rings that measure 6cm from outside to outside.

The sweet iron is designed to rust when it comes into contact with humidity; this surface rust tastes sweet and naturally stimulates the horse's saliva production, encouraging soft acceptance of the bit.

This oxidisation process changes the blue colour of the Trust bit to a brownish-grey.

If a sweet iron bit is not used for a while, an orange-brown rust layer may develop on the mouthpiece. Simply remove this by wiping the bit with a damp cloth.

The Trust Equestrian Pony Sweet Iron Elliptical Eggbutt Snaffle is available in 10.5cm (just over 4in).