The park tool sw 12 double ended spoke wrench is a forged double ended spoke wrench designed to fit select mavicreg wheels using integrated m7 nipples precision machined plated and vinyl dipped for comfort and long life park tool sw 12 double ended spoke wrench features two sided spoke wrench is designed for mavic wheel sets long handle provides good leverage for stubborn spoke nipples fits both mavic 7 spline 64 mm outer diameter and 6 spline 9 mm outer diameter mavic n