3/8 in. Drive 6-Point Metric Sockets (Blackhawk) The radius corner design of Blackhawk by Proto sockets allows contact with the flat edges of the fastener, not the points. This style of contact moves the driving force from the corners to the flat areas, increasing the torque on the fastener, reducing rounding and increasing safety. Double nickel chrome plated for a corrosion resistant, full polish finish. ISO certified and made in USA.
