- The sweet iron copper tom thumb is a popular bit amongst showjumpers, being similar in action to an American gag but without the action of the mouthpiece being raised up in the horses mouth
- The shank of the Tom thumb bit gives leverage and encourages the horse to keep his carriage lower as well as providing brakes
- The combination of sweet iron and copper makes the bit very palatable and almost all horses will salivate and soften in response to the taste
