【Product 】13/16 to 1-1/2 in. w/laser etched markingsMeets or exceeds ANSI standardsHigh-contrast,permanent,laser-etched size markings 【Description】From trucks and tractors to heavy equipment and large machinery,big service and repair jobs need the TEKTON 3/4 in. Drive Deep Impact Socket Set. Made for use w/impact wrenches,these premium chrome vanadium sockets deliver superior performance. Deep broach offers the length to reach over threaded shafts and into recesses. High-torque,6-point design contacts and grips the stronger flat sides of fastener head,not the weaker corners,to prevent stripping or round-off under extreme stress. Extra large,high-contrast size markings are permanently laser etched onto each socket,making size selection quick and eas.