Reasonable Set: Libraton 24PCS magnetic nut driver set contains 8PCS metric magnetic nut driver(6mm * 2pcs, 7mm, 8mm, 10mm, 11mm, 12mm, 13mm), 8PCS SAE magnetic nut driver(1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2"), 4PCS 2" screwdriver bits (PH1, PH2, SL3/16, SL1/4), 3PCS impact socket adapter(1/4'', 3/8'', 1/2''), and 1PC 1/4" Magnetic Bit Holder. One set is enough for all. Premium Quality: All impact nut drivers, bit holder, and socket adapters are made of Cr-V steel. Treated with black manganese phosphate, these nut drivers have strong resistance to oxidation and corrosion. The screwdriver bits are made of S2 steel, longer service life, higher shock-resistance. High Performance: The 1/4" hex shank allows the nut drivers, adapters, and bits can be used with a variety of quick-change chucks and drills. All nut drivers are equipped with a premium magnet inside to hold the drill bit firmly when fastening or loosening the nut or the bolt. Easy to Carry and Ideal Gift for Him: All nut drivers and other accessories can be well organized in a storage box with a clear lid, easy to store in your toolbox or carry around. It is also an ideal gift for a man, father, him, or grandpa. Good After-sales Service: Please just let us know if you have any problems with the nut driver set. We promise to offer you 100% satisfaction after-sales. Our service team will be always here for you to reply to your message within 24 hours., Manufacturer: LIBRATON