This GearWrench 1" deep socket has a 6-point opening for secure, round-fastener engagement and reduced rounding on worn or rusted bolts. The deep-well length reaches recessed and protruding fasteners that standard-depth sockets cannot - alternator bolts, spark plugs, valve cover studs, and threaded posts that stick up past the surrounding hardware.

• Size: 1" SAE
• Drive: 3/8" square drive
• Configuration: 6-point opening
• Surface Drive technology contacts the flats of the fastener (not the corners) for higher torque transfer and less rounding
• Chamfered opening guides the fastener cleanly into the socket
• Chrome vanadium alloy steel construction with full-polish chrome finish for corrosion resistance
• Hard-stamped size markings for easy identification in a tray or wall holder
• Meets or exceeds ASME B107.1 specifications

Tip: Use 1" for axle and spindle nuts on heavy-duty trucks, large industrial/agricultural machine bolts, the largest SAE size in this driver class - step up to 1/2" drive sockets for the 1" range and beyond when torque exceeds 3/8" drive ratings. Deep sockets give you reach but trade torque control - on stuck or rusted fasteners use a 6-point (not 12-point) and add penetrating oil before applying force. For lug nuts or anything over 80 ft-lb, step up to a 1/2" drive socket - the 3/8" drive square is rated for general-purpose automotive work, not heavy torque.