Stubborn fasteners and lug nuts are no match for the Neiko half inch drive deep impact socket set. The unique six point design allows the socket to grip flat against the fastener wall in order to have a stronger grip while loosening without rounding off the corners while the deep wall design accommodates longer fasteners . Constructed from high strength Cr-V steel with a durable black phosphate finish to fight against corrosion better than your traditional black oxide finish. The set is laser etched with each size on the socket for easy identification when working. This set was made to pair perfectly with your impact tools and with the extra deep walls, you can easily free rusty suspensions and even crank bolts with ease by transferring torque from your impact wrench to the lug nut.