?Made of High quality Carbon Steel with Zinc Plated Coating, better weld ability and resistance to corrosion than the regular steel ?This collar comes with a socket cup-point setscrew for securing the collar onto the shaft ?Good axial and radial support performance, durable choice for nearly all types of machinery and industry, such as drive shafts, agricultural implements, medical equipment, gearbox assemblies, motor bases, machine tools, and paper and steel mill equipment, the automotive industry, the manufacturing industry, the hobby craft industry