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Power built sockets feature chrome vanadium construction. Socket lengths exceed ANSI standards and have the center hole punched through for additional working depth on the work surface. Power built chrome sockets feature HV high visibility size markings that are three times larger for easy size selection. The size callout is forged into the socket wall using a patent-pending process, and will not rub off or wear out with use. Finally Power built sockets feature Z-Drive, contacting the flat walls of fasteners for stronger grip.