Armstrong 36-320 3/8″ Drive 12 Point 5/8″ Socket USA

Made in the USA – quality and availability
Radius corner design engages the flats of the fastener, not the corners, providing up to 15-Percent -20-Percent more torque while reducing fastener rounding, enhancing the turning of worn fasteners
Thinner socket wall dimensions provide increased access to restricted fasteners with no loss in socket strength
Bolt clearance holes have larger diameters and depths to accommodate a wider variety of fasteners

Aeronca x 6 all