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Powerbuilt sockets are constructed of durable chrome vanadium to withstand a 30-hour salt spray corrosion test. Socket lengths exceed ANSI standards and center holes are punched through to give you a little extra depth on the work surface. Twin grease rings help you hold onto the socket with oily hands. Socket ends are beveled for easier mating to fasteners. And Z-Drive is a socket point design that contacts the flat walls of fasteners for up to 20% more turning power.
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