The ” NK Bits” best fit for pneumatic and electric screwdrivers! Bit is the key element connecting the screwdriver and the screw itself requiring high precision shank dimensions, high impact and wearing durability suitable to each fastening condition and best compatibility with the screw. ” NK Bits” adopt special alloy exclusively refined for screw bits and are finished with high quality by essential requirements for bits applying best reserved machining and heat treatment technologies. Further, you can select the right bit for your specific fastening requirements from the range of ” NK Bits”