RidersRasp is not a trimming tool it is a maintenance tool for horse owners. People who would buy this tool? People who can not use a regular farriers rasp. People who pay attention to their horses hooves between farrier visits. RidersRasp has finish files, so you won't remove too much hoof wall. With RidersRasp you do not put the foot between your legs, you are beside the horse. Why didn't someone think of this tool before now? An emory board for the horse! Oh, and a Farrier invented it. Am I a RidersRasp expert or what? LOL