Bridles for the horses may use a wide variety of bits or hackamores. Bitless bridles are similar to hackamores, but some designs use different leverage principles for control. Hackamores are more often seen in western riding. Other assorted designs of bitless headgear, often classed as "bitless bridles", are not true hackamores. Hackamores are traditionally used one rein at a time, with fluctuating pressure.