Also a large, rasp-like tool used to file the teeth of a horse. It's about 12" in length, with various carbide surfaces that go on a rectangular pad on the end. In the wild, horses graze the majority of the time causing plenty of wear on their teeth. Modern domestic horses are typically fed smaller meals multiple times a day and do not get as much wear. Because of this, you have to periodically float a horse's teeth to keep them from growing sharp and causing cuts in it's mouth. So, you basically take this big old float and file down the teeth, which can be quite a workout. Generally this should be done about once a year, but it depends on the tooth enamel and diet of the horse in question.