EXTENDED REACH & HOLLOW CORE: The 5-inch length facilitates easy use in hard-to-reach areas (e.g., under hoods, machinery). The hollow shaft design, with a depth of 3.35 inches, easily handles situations where bolts protrude and is ideal for handling long bolts and threaded rods. POWERFUL MAGNETIC FORCE: A specialized ring magnet engineered for hollow nut driver, this design securely holds nuts/bolts, lets long threaded rods extend deep into the nut driver, and prevents loss in tight spots. COLOR CODED: The color coding is clearly distinguishable, allowing for quick identification of the corresponding size and saving time. INCLUDES: 6 PCS SAE Hollow Shaft Nut Drivers: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16". They improve work efficiency and are trustworthy helpers in work. IMPACT-GRADED: Cr-V steel, forged and finished with black oxide, offers high strength, excellent impact resistance, and long durability. Provide strong grip and torque, and can reliably complete various tasks such as removing or installing nuts and bolts, handling threaded rods, HVAC work, and electrical repairs. Color: As Shown Material: Metal Package Contents: 6 PCS Hollow Nut Driver Set