Material This steel internal hex bit socket set is made from durable steel and undergoes thorough heat treatment to deliver hardness and toughness. The material ensures reliable performance during use. Finish The sand-blasted surface enhances appearance while resisting rust and preserving a smooth look over time. The finish adds a subtle, professional style and provides practical protection against damage. Versatility Suitable for construction, manufacturing, appliance repair, and automotive repair. Its broad range of applications makes it a valuable addition to any professional toolkit or toolset. Storage Includes a storage box for easy organization and portability. The box keeps the bits secure, reduces the risk of loss, and allows you to keep all tools in one convenient place. Applications - Automotive repair: tighten or loosen internal hex fasteners in engines and components. - Construction and manufacturing: assemble and service machinery and equipment. - Household appliance repair: service and maintain household devices that use internal hex fasteners.