The BlueSpot 2 PCE 150mm PZ2 Driver Set is manufactured from chrome vanadium for increased durability with a sandblasted, corrosion-resistant finish. The drivers have an extra long shank for increased reach and precision in hard to reach areas. The 1/4" is ideal for use with power drills and electric screwdrivers.Manufactured from chrome vanadium for increased durabilityCorrosion protection finish 1/4"Extra long shank