<p><b>Why you need these:</b> <br>- Sockets are made with Heat Treated Chrome Vanadium and knurled for enhanced grip <br>- Bits are high strength S2 steel <br>- CNC machining ensures accurate size and fit</p> <p><b>Amazon buyers trust ARES to be Quality Tools</b> <br>- You are backed by our Performance Assurance! Just contact customerservice@arestool.com with any questions/concerns.</p>