Use small road studs to give your horse more traction if you ride on hard ground, such as asphalt or rocky trails. If you ride on hard grass or hard grass with a slippery surface after rainfall, you should use grass studs. Grass studs are long and narrow with a pointed tip which can penetrate hard, dry earth. You should avoid using grass studs on the inner hoof because they can catch the horse's opposite leg and injure it. As a precaution, you should always use brushing boots with pointed studs.