The KUKKO Quality Tools Inc Trigger Hook Set includes ball bearings compliant with ISO standards 6216 through 6222. This set is engineered for optimal performance in various mechanical applications, ensuring smooth and reliable operation. Each hook is constructed from high-quality materials, providing durability and resistance to wear. The precise dimensions and specifications of these hooks make them suitable for a wide range of tasks, enhancing the efficiency of your projects. Ideal for professionals seeking dependable tools for their mechanical needs.