Wright sockets feature the patented Wright Drive®, which provides more torque with less fastener damage. The Wright Drive design distributes contact stress more effectively than any other wrench system, with the stress spread over a larger contact area and away from the corners, Wright Drive improves fastener torque load while decreasing rounding and distortion of the fastener. Improved 6-point contact means more grip, torque and stretch. The Wright Drive 6-point moves the contact area away from the corners, creating greater strength, more torque. Its circle diameter reduces fastener rounding and allows better grip on undersized fasteners and previously rounded corners. Patented Wright Drive® distributes contact over a larger surface area for greater gripping power and strength, oiled black oxide finish. Forged and machined for best fit and unyielding strength. Precision heat-treated and tempered for optimal hardness, ductility and durability. Easy to read stamp pattern in order to quickly determine opening size. Meets or exceeds ASME B107.110. Made in the USA.