Shires Sweet Iron Copper Tom Thumb

This bit is made of sweet iron and copper, promoting salivation and encouraging softening. Its lever action is created by the cheeks, while the raised copper ribs help prevent the horse from taking too strong a hold. The mouthpiece is 14mm thick and the cheeks are 140mm tall, and it is available in the following sizes: 3" (7.5cm), 3.5" (9cm), 4" (10cm), 4.25" (10.5cm), 4.5" (11.5cm), 4.75" (12cm), 5" (12.5cm), 5.25" (13cm), 5.5" (14cm), 5.75" (14.5cm), and 6" (15cm).