Features: Magnetic Nut Driver Set: metric (6, 7mm 8mm 9mm 10mm 11mm 12mm 13mm 14mm 15mm) and SAE (1/4'' 9/32'' 5/16'' 11/32'' 3/8'' 7/16'' 1/2'' 9/16'') size. Crafted from steel, this set ensures long use and easy identification of size. Each nut driver in this set features a highs-quality magnets inside, providing a secure grip when fastening , loosening nut and bolt. To keep your nut driver organized and easily accessible, this set come with a storage bag. Suitable for both professional and DIY enthusiasts, our universal set is great for various fastening tasks. Specifications: Material:Alloy Steel Metric Size:(6, 7mm, 8mm, 10mm, 11mm, 12mm, 13mm, 14mm) SAE Size:(1/4", 9/32", 5/16", 3/8", 7/16", 1/2", 9/16") SocketSpannerInsert Adapter:1/4",3/8",1/2" 1/4'' BitHolder 3 Expanders: 660mm, 100mm, 150mm Package Includes: 21Pcs Magnetic Nut Driver Set note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.