Hardened for extra strength. Lobular design exerts force on flats of fasteners. Chamfered opening slips easily over fasteners and holds securely. Prevents rounding of fasteners corners. Thin wall design fits into tight spots.
From the Manufacturer
Armstrong Industrial Hand Tools have a heritage of Made in the USA since four brothers founded the company in 1890. This Armstrong brand product is built from premium materials and workmanship ensuring unequalled strength, toughness, and durability. Product Type: 1/4-Inch Drive 6 Point Standard Socket Product Name: 1/4-Inch Drive 6 Point Standard Socket Finish: Full Polish Chrome Drive Tang Size (Inch): 1/4 Fastener Size: 5/16 Drive Type: 6 Point Dimension A: Drive End (Inch): 0.463 Dimension B: Wrench End (Inch): 0.463 Dimension C: Overall Length (Inch): 0.876 Dimension D: Bolt Clearance (Inch): 0.208 Dimension E: Wrench Depth (Inch): 0.290 Dimension F: Length to Shoulder (Inch): ASME Specification: B107.1-2002 US Federal Specification: GGG-W-641 E Length Format: Standard SAE/Metric: SAE.