Wright sockets feature the patented Wright Drive®, which provides more torque with less fastener damage. Patented Wright Drive® distributes contact over a larger surface area for greater gripping power and strength. 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.