• Surface drive technology reduces fastener rounding
• Chamfered opening to guide fastener into socket
• Large hard-stamped size identification
• Double line (SAE) and knurled (Metric) ring to easily identify standard vs. Metric sockets
• Full polish chrome finish cleans easily and resists corrosion
• Meets or Exceeds ASME B107.1 and US Federal Spec. GGG-W-641 E
• SAE/Metric/Torx: Metric
• ASME Specification: B107.5M
• Fastener Size: 20 mm
• Drive Type: 12 Point
• Drive Tang Size: 3/8”
• Length Format: Standard
• Dim. A: Drive End: 1.016”
• Dim. C: Overall Length: 1.102”
• Dim. F: Length to Shoulder: 0.453”
• Dim. D: Bolt Clearance: 0.354”
• Dim. E: Wrench Depth: 0.591”
• Dim. B: Wrench End: 1.063”