* These Screwdriver Bits are with magnetic design.* Easy to install on the screwdriver handle.* Great replacement for missing, bent or broken Ball End Hex screwdriver bits.* Superior Quality: Those Ball End Hex Screwdriver Bits are made of S2 alloy steel, which is a commonly used material in hardware with high hardness.* Magnetic Screwdriver - Widely used for manual electric screwdriver, screwdriver, drill, air and other tools, ect.