This is a pair of Rock Shooter Black Brass SCX24™ 1.0" Wheels. These little wheels are major heavyweights! Pro-Line's 1.0" Rock Shooter wheels are CNC machined from Brass to give your SCX-24™ or other mini-crawler the lowest possible center of gravity. All three pieces of the internal bead-loc wheel are made of high-quality brass, for the most possible weight added!