The Sure-Grip "Magnum" front and rear fins are designed to give the speed skater complete control and foot support for turns and transitions. To disperse necessary drag and inertia, the Magnum provides a unique balance and torque system through its center section and converged ridged ends. This aircraft aluminum alloy Magnum is available with a yellow-baked enamel finish and polished aluminum trucks (shown with yellow trucks which are no longer available).