Crafted from heat-treated CR-V steel, it delivers high strength and rugged durability to withstand the extreme torque of pneumatic impact wrenches No more wasting time guessing at sizes. We use high-contrast laser-etched markings on our sockets to make it easy to find the one you need Equipped with extension rods in three sizes to fit most narrow environments The thickened 6-point flank design securely grips fasteners, preventing socket rounding damage from impacts.