Park Tool Hex wrenches made from industrial tool steel, hardened and tempered for shop use.   

• Shop quality L-Shaped hex wrench set for various hex key service work on bicycles
• Through-hardened industrial quality steel
• Includes sizes 1.5mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 8.0mm, 10.0mm
• Ball head on long end to reach hard access fixtures for threading-unthreading (10mm excluded)