3/4" Dr. Standard Impact Sockets, 3/4 in Drive, 21 mm, 4 Points

Patented Wright Drive® design 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.