New Hold-a-Rotor™ Tool (STC71000) is design engineered to hold automotive and light truck disc brake rotors in place during repairs. With a durable, ridged-polymer design to fit the most common 12MM and 14MM wheel mounting studs, the Hold-a-Rotor covers over 90 percent of domestic and European vehicles. This tool helps speed up technician repair times during brake pad, wheel bearing jobs, and other wheel and brake repairs that require the removal of the rotor.