Cavallo metal boot studs provide improved traction of Cavallo Boots in winter conditions. Applicator fits right in the end of your drill to make installing studs quick and easy. Simply pre-drill 1/8″ locator holes with a 3/16″ drill bit. Lock stud into position on the end of the applicator tool (sold separately). Position end of the stud tread over the drilled hole and slowly drill the stud into the sole tread until the base of the stud head touches the sole.