12-Pieces Magnetic Nut Driver Bit Set,includes SAE（1/4",5/16",3/8",7/16",1/2",9/16") and Metric（8mm,10mm,11mm,12mm,13mm,14mm) sizes,65mm overwall length.
Material:high-quality chrome vanadium steel, overall heat treated, with a black phosphate coating on the surface, corrosion-resistant, wear-resistant and durable.
Strong magnetism make the installation and removal of the self drilling screws quickly and safely.
1/4 Inch Hex Shank suitable for electric screwdriver ,hand screwdriver, electric drills. quickly and easy to change.
The nut drivers work great for driving hex screws and bolts.But the drivers are shallow,they can not work for nuts which need to be tightening of long bolts.
The nut driver bit set is stored in a plastic box for easy collection and storage.
