Opera Hardware Set 1" Allen - Black/Blue Professional-grade fastening system engineered for high-performance roller skate builds. This 1" Allen key set combines black and blue anodized components for superior durability and corrosion resistance. Precision-machined for exact fitment on mounting plates, axles, and structural components. The larger 1" size provides enhanced leverage and stability for secure assembly. Built to endure intense skating sessions and frequent maintenance cycles. A trusted choice for competitive skaters and technicians seeking reliable hardware that maintains integrity under demanding conditions.