Most BONOSS wheel nut materials are high-strength alloy steel, forged process, ISO898-6 grade 10 standard performance, relevant third-party authoritative testing institutions TUV and SGS test report please see attachment. At the same time, some BONOSS wheel nut materials are aluminum alloy 7075T6 or titanium alloy materials, forged process, related third-party authoritative testing institutions TUV and SGS test report please check here:
