Box end has built-in N-PowerFit Drive- Increased
strength and reduces rounding or fastener damage by
distributing stress through a gentle arc in the bore by
enlarging the contact surfaceBox end flat ground so
teeth reach edge of wrench vs beveled for 20% greater grip
strengthOpen end has reinforced teeth to prevent
cracking and breakingMachined to tightest dimensional
tolerance for best fit in the industryAngle rise of 15
degree for box endClear engraving- The
beautifully-refined engravings are easy to see and increase
the efficiency of work.Compact external diameter is
among smallest in the world and ideal for tight
spacesSet contents 3/8", 7/16", 1/2", 9/16", 5/8",
11/16", 3/4"
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