Constructed from Cr-v (Chrome Vanadium) steel: Heat-treated Chrome Vanadium steel ensures tool durability and a long service life. The set includes 14 Star bits (T8–T70) and 13 E-Torx sockets (E4–E24), suitable for automotive repair, mechanical work, and Diy projects. Premium S2 alloy steel Star bits: Die-forged for enhanced torque and reduced wear. High-contrast markings: Sizes are easily identifiable in various lighting conditions, facilitating quick use with wrenches or ratchets. Includes socket adapters (1/4"" to 3/8"", 3/8"" to 1/2"") to handle diverse tasks compatible with manual wrenches, power drills/drivers, or impact tools. Weight: 3.7 lbs.