Snap-on TS321 is a 1/2" drive, 6-point deep socket sized for 1" SAE fasteners. It uses Snap-on's Flank Drive design to grip fasteners on the flats for improved turning power and reduced rounding under torque. The deep-length configuration provides extended reach for recessed fasteners and longer bolts, making it suitable for automotive and equipment work where a 1" nut or bolt is encountered. It is compatible with standard 1/2" drive ratchets and extensions.
