Our black chrome products can pass at least 300 hours of NSS test. Therefore, the plating quality is our biggest advantage.
Our company has set up a quality inspection center with metallographic analyzer, concentricity detector, hardness tester, universal testing machine, torsion machine, coating thickness tester, salt spray tester, light screening instrument, thread detector and other testing equipment.
This kind of testing equipment strictly implements the complete quality management process of first inspection, self-inspection, patrol inspection, final inspection and SGS random inspection. Especially, before packaging, each of our products will be fully inspected the appearance, the size, and the thread, to ensure that each product delivered to the customer is qualified.
Each nut and bolt evolve 4 series of wheel lock: outer pattern wheel lock, tuner wheel lock, outer pattern style + revolving sleeve wheel lock, tuner style + revolving sleeve wheel lock. Each series of wheel lock can evolve many different patterns through various shape, size, spline number and space width, increasing the anti-theft performance. Until 2014, “HONGSHENG WHEEL LOCK” has more than 4000 different patterns of wheel lock and also continuously increases.