High Quality MaterialMade of hardened and heat treated chrome vanadium steel. The surface of the key is brightly treated with chrome, and the surface is treated with nine-color powder coating.Rich in Different Sizes and Types 9pcs spherical diameter spherical key: 1.5. 2. 2.5. 3. 4. 5. 6. 8. 10mm.Easy To UseColor coded rubber coating for comfort. control and rapid identification. Easy-access case for secure storage and quick wrench selection.Convenient Design Precisely sized chamfered ends fit smoothly into the fastener head. thus reducing wear.Multi ApplicationThe wrench set can be used to remove and install most car socket head screws. furniture. equipment. More complete specifications. will be applied to a wider range of scenarios.