About this item Hex keys ball ends are crafted from high-quality heat treat chrome vanadium steel, with 52-55HRC hardness. Our hex key wrench set is made to produce premium performance, long term, and resistant use This set includes various hex key sizes; 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm. The allen keys set comes with a hinged case, reducing the effort in putting all the sets pieces together and keeping them Hex wrench developed with a ball endpoint, these hex keys set can easily remove and install most socket cap screws found in cars, furniture, equipment, and more. Allowing easier access to those hard-to-reach spaces and making it easy for adjusting in all angles Precisely-sized, chamfered ends insert smoothly into fastener head, reducing wear.