• Circular shape conforms better to the hand
  • Exceed ASME B107
  • 100 standard
  • Opening size: 9/16"
  • Total length: 7-1/2"
  • Outside diameter open end: 1-13/64"
  • Outside diameter box end: 7/8"
  • Head thickness open end: 9/32"
  • Head thickness box end: 23/64"
1218A
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